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<a href="segregated__thread__task__loop_8cpp.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a id="l00001" name="l00001"></a><span class="lineno">    1</span><span class="comment">/* Flow</span></div>
<div class="line"><a id="l00002" name="l00002"></a><span class="lineno">    2</span><span class="comment"> * Copyright 2023 Akamai Technologies, Inc.</span></div>
<div class="line"><a id="l00003" name="l00003"></a><span class="lineno">    3</span><span class="comment"> *</span></div>
<div class="line"><a id="l00004" name="l00004"></a><span class="lineno">    4</span><span class="comment"> * Licensed under the Apache License, Version 2.0 (the</span></div>
<div class="line"><a id="l00005" name="l00005"></a><span class="lineno">    5</span><span class="comment"> * &quot;License&quot;); you may not use this file except in</span></div>
<div class="line"><a id="l00006" name="l00006"></a><span class="lineno">    6</span><span class="comment"> * compliance with the License.  You may obtain a copy</span></div>
<div class="line"><a id="l00007" name="l00007"></a><span class="lineno">    7</span><span class="comment"> * of the License at</span></div>
<div class="line"><a id="l00008" name="l00008"></a><span class="lineno">    8</span><span class="comment"> *</span></div>
<div class="line"><a id="l00009" name="l00009"></a><span class="lineno">    9</span><span class="comment"> *   https://www.apache.org/licenses/LICENSE-2.0</span></div>
<div class="line"><a id="l00010" name="l00010"></a><span class="lineno">   10</span><span class="comment"> *</span></div>
<div class="line"><a id="l00011" name="l00011"></a><span class="lineno">   11</span><span class="comment"> * Unless required by applicable law or agreed to in</span></div>
<div class="line"><a id="l00012" name="l00012"></a><span class="lineno">   12</span><span class="comment"> * writing, software distributed under the License is</span></div>
<div class="line"><a id="l00013" name="l00013"></a><span class="lineno">   13</span><span class="comment"> * distributed on an &quot;AS IS&quot; BASIS, WITHOUT WARRANTIES OR</span></div>
<div class="line"><a id="l00014" name="l00014"></a><span class="lineno">   14</span><span class="comment"> * CONDITIONS OF ANY KIND, either express or implied.</span></div>
<div class="line"><a id="l00015" name="l00015"></a><span class="lineno">   15</span><span class="comment"> * See the License for the specific language governing</span></div>
<div class="line"><a id="l00016" name="l00016"></a><span class="lineno">   16</span><span class="comment"> * permissions and limitations under the License. */</span></div>
<div class="line"><a id="l00017" name="l00017"></a><span class="lineno">   17</span><span class="comment"></span> </div>
<div class="line"><a id="l00018" name="l00018"></a><span class="lineno">   18</span><span class="comment">/// @file</span></div>
<div class="line"><a id="l00019" name="l00019"></a><span class="lineno">   19</span><span class="comment"></span><span class="preprocessor">#include &quot;<a class="code" href="segregated__thread__task__loop_8hpp.html">flow/async/segregated_thread_task_loop.hpp</a>&quot;</span></div>
<div class="line"><a id="l00020" name="l00020"></a><span class="lineno">   20</span><span class="preprocessor">#include &quot;<a class="code" href="task__qing__thread_8hpp.html">flow/async/detail/task_qing_thread.hpp</a>&quot;</span></div>
<div class="line"><a id="l00021" name="l00021"></a><span class="lineno">   21</span><span class="preprocessor">#include &quot;<a class="code" href="async_2util_8hpp.html">flow/async/util.hpp</a>&quot;</span></div>
<div class="line"><a id="l00022" name="l00022"></a><span class="lineno">   22</span><span class="preprocessor">#include &quot;<a class="code" href="sched__task_8hpp.html">flow/util/sched_task.hpp</a>&quot;</span></div>
<div class="line"><a id="l00023" name="l00023"></a><span class="lineno">   23</span> </div>
<div class="line"><a id="l00024" name="l00024"></a><span class="lineno">   24</span><span class="keyword">namespace </span><a class="code hl_namespace" href="namespaceflow_1_1async.html">flow::async</a></div>
<div class="line"><a id="l00025" name="l00025"></a><span class="lineno">   25</span>{</div>
<div class="line"><a id="l00026" name="l00026"></a><span class="lineno">   26</span> </div>
<div class="line"><a id="l00027" name="l00027"></a><span class="lineno">   27</span><span class="comment">// Implementations.</span></div>
<div class="line"><a id="l00028" name="l00028"></a><span class="lineno">   28</span> </div>
<div class="line"><a id="l00029" name="l00029"></a><span class="lineno"><a class="line" href="classflow_1_1async_1_1Segregated__thread__task__loop.html#a224eeb57edd6e218f984dcbe603b68d3">   29</a></span><a class="code hl_function" href="classflow_1_1async_1_1Segregated__thread__task__loop.html#a224eeb57edd6e218f984dcbe603b68d3">Segregated_thread_task_loop::Segregated_thread_task_loop</a>(<a class="code hl_class" href="classflow_1_1log_1_1Logger.html">log::Logger</a>* logger_ptr, <a class="code hl_typedef" href="namespaceflow_1_1util.html#ae4dc52186797094b3040379ff19124c9">util::String_view</a> nickname,</div>
<div class="line"><a id="l00030" name="l00030"></a><span class="lineno">   30</span>                                                         <span class="keywordtype">size_t</span> n_threads_or_zero,</div>
<div class="line"><a id="l00031" name="l00031"></a><span class="lineno">   31</span>                                                         <span class="keywordtype">bool</span> est_hw_core_sharing_helps_algo,</div>
<div class="line"><a id="l00032" name="l00032"></a><span class="lineno">   32</span>                                                         <span class="keywordtype">bool</span> est_hw_core_pinning_helps_algo,</div>
<div class="line"><a id="l00033" name="l00033"></a><span class="lineno">   33</span>                                                         <span class="keywordtype">bool</span> hw_threads_is_grouping_collated) :</div>
<div class="line"><a id="l00034" name="l00034"></a><span class="lineno">   34</span>  log::Log_context(logger_ptr, <a class="code hl_enumeration" href="namespaceflow.html#a3938730ab4b89daf13d027a5f620e7ce">Flow_log_component</a>::<a class="code hl_enumvalue" href="namespaceflow_1_1async.html#a0a06794b16b72f2829ce3353557c8485a4d7a5700444c0570af37b1f9bcc6eb1f">S_ASYNC</a>),</div>
<div class="line"><a id="l00035" name="l00035"></a><span class="lineno">   35</span> </div>
<div class="line"><a id="l00036" name="l00036"></a><span class="lineno">   36</span>  m_nickname(nickname),</div>
<div class="line"><a id="l00037" name="l00037"></a><span class="lineno">   37</span>  m_n_threads_or_zero(n_threads_or_zero),</div>
<div class="line"><a id="l00038" name="l00038"></a><span class="lineno">   38</span>  m_est_hw_core_sharing_helps_algo(est_hw_core_sharing_helps_algo),</div>
<div class="line"><a id="l00039" name="l00039"></a><span class="lineno">   39</span>  m_est_hw_core_pinning_helps_algo(est_hw_core_pinning_helps_algo),</div>
<div class="line"><a id="l00040" name="l00040"></a><span class="lineno">   40</span>  m_hw_threads_is_grouping_collated(hw_threads_is_grouping_collated),</div>
<div class="line"><a id="l00041" name="l00041"></a><span class="lineno">   41</span> </div>
<div class="line"><a id="l00042" name="l00042"></a><span class="lineno">   42</span>  <span class="comment">/* Note to reader: If you grok the doc headers of superclass and Segregated_thread_task_loop, the following</span></div>
<div class="line"><a id="l00043" name="l00043"></a><span class="lineno">   43</span><span class="comment">   * is easy to understand.  If you don&#39;t, then to make it clear I&#39;d have to repeat all of that here, basically.</span></div>
<div class="line"><a id="l00044" name="l00044"></a><span class="lineno">   44</span><span class="comment">   * So please grok it first. */</span></div>
<div class="line"><a id="l00045" name="l00045"></a><span class="lineno">   45</span> </div>
<div class="line"><a id="l00046" name="l00046"></a><span class="lineno">   46</span>  m_qing_threads((m_n_threads_or_zero == 0) <span class="comment">// n_threads() nulls: still need to set each one after this.</span></div>
<div class="line"><a id="l00047" name="l00047"></a><span class="lineno">   47</span>                   ? <a class="code hl_function" href="namespaceflow_1_1async.html#adab04f47b40b92fffbe12bc33fadd223">optimal_worker_thread_count_per_pool</a>(logger_ptr, m_est_hw_core_sharing_helps_algo)</div>
<div class="line"><a id="l00048" name="l00048"></a><span class="lineno">   48</span>                   : m_n_threads_or_zero),</div>
<div class="line"><a id="l00049" name="l00049"></a><span class="lineno">   49</span>  <span class="comment">// n_threads() is now accurate.</span></div>
<div class="line"><a id="l00050" name="l00050"></a><span class="lineno">   50</span>  m_task_engines(n_threads()) <span class="comment">// n_threads() nulls: still need to set each one after this.</span></div>
<div class="line"><a id="l00051" name="l00051"></a><span class="lineno">   51</span>{</div>
<div class="line"><a id="l00052" name="l00052"></a><span class="lineno">   52</span>  <span class="keyword">using </span><a class="code hl_typedef" href="namespaceflow_1_1util.html#ac3e89a8a271b0ddc76ac2a0ce488dea4">util::Task_engine</a>;</div>
<div class="line"><a id="l00053" name="l00053"></a><span class="lineno">   53</span> </div>
<div class="line"><a id="l00054" name="l00054"></a><span class="lineno">   54</span>  <span class="comment">/* m_per_thread_task_engines will store the `n` Task_engines.  These will be cted now and destroyed in dtor;</span></div>
<div class="line"><a id="l00055" name="l00055"></a><span class="lineno">   55</span><span class="comment">   * they will survive any stop()s or start()s (which stop and start all the threads in thread pool respectively).</span></div>
<div class="line"><a id="l00056" name="l00056"></a><span class="lineno">   56</span><span class="comment">   * For each Task_engine E, post(E, F) (etc.) is safe while E.stopped() is false, or true, or even across that value</span></div>
<div class="line"><a id="l00057" name="l00057"></a><span class="lineno">   57</span><span class="comment">   * changing, by boost.asio docs guaranteeing this tread safety. */</span></div>
<div class="line"><a id="l00058" name="l00058"></a><span class="lineno">   58</span>  <span class="keywordflow">for</span> (<a class="code hl_typedef" href="namespaceflow_1_1async.html#a968806f54b14c697fd76b3339a2bdbbf">Task_engine_ptr</a>&amp; task_engine_ptr_in_container : <a class="code hl_variable" href="classflow_1_1async_1_1Segregated__thread__task__loop.html#ad09c2d973e3794f36bf06bd001ca860e">m_task_engines</a>)</div>
<div class="line"><a id="l00059" name="l00059"></a><span class="lineno">   59</span>  {</div>
<div class="line"><a id="l00060" name="l00060"></a><span class="lineno">   60</span>    <span class="comment">// Attn: The concurrency-hint=1 may avoid or all most locking in boost.asio.  Exactly 1 thread in the Task_engine.</span></div>
<div class="line"><a id="l00061" name="l00061"></a><span class="lineno">   61</span>    task_engine_ptr_in_container.reset(<span class="keyword">new</span> <a class="code hl_typedef" href="namespaceflow_1_1util.html#ac3e89a8a271b0ddc76ac2a0ce488dea4">Task_engine</a>(1));</div>
<div class="line"><a id="l00062" name="l00062"></a><span class="lineno">   62</span> </div>
<div class="line"><a id="l00063" name="l00063"></a><span class="lineno">   63</span>    <span class="comment">/* Task_engine starts in !stopped() mode ready to run().  start() pre-condition is stopped() so for simplicity</span></div>
<div class="line"><a id="l00064" name="l00064"></a><span class="lineno">   64</span><span class="comment">     * start in the same state that our stop() would put the Task_engine into: */</span></div>
<div class="line"><a id="l00065" name="l00065"></a><span class="lineno">   65</span>    task_engine_ptr_in_container-&gt;stop();</div>
<div class="line"><a id="l00066" name="l00066"></a><span class="lineno">   66</span>    <span class="comment">// Now our start() can always do the sequence: restart() (to make it !stopped()), then run().</span></div>
<div class="line"><a id="l00067" name="l00067"></a><span class="lineno">   67</span>  }</div>
<div class="line"><a id="l00068" name="l00068"></a><span class="lineno">   68</span> </div>
<div class="line"><a id="l00069" name="l00069"></a><span class="lineno">   69</span>  <span class="comment">// Initialize our Ops_list of pre-created Ops which in our case simply store all `n` `Task_engine_ptr`s.</span></div>
<div class="line"><a id="l00070" name="l00070"></a><span class="lineno">   70</span>  <span class="keyword">const</span> <span class="keywordtype">size_t</span> n = <a class="code hl_function" href="classflow_1_1async_1_1Segregated__thread__task__loop.html#a28d7c70f0d3147ba48a10afa84ef98c1">n_threads</a>();</div>
<div class="line"><a id="l00071" name="l00071"></a><span class="lineno">   71</span>  <a class="code hl_variable" href="classflow_1_1async_1_1Segregated__thread__task__loop.html#a3e643b2f348746d57b1e2ddb81a1150a">m_per_thread_ops</a>.reset(<span class="keyword">new</span> <a class="code hl_class" href="classflow_1_1async_1_1Op__list.html">Op_list</a>(<a class="code hl_function" href="classflow_1_1log_1_1Log__context.html#af4db395042b065b00398cd59845dcb4d">get_logger</a>(), n,</div>
<div class="line"><a id="l00072" name="l00072"></a><span class="lineno">   72</span>                                     [<span class="keyword">this</span>](<span class="keywordtype">size_t</span> idx) -&gt; <a class="code hl_typedef" href="namespaceflow_1_1async.html#a024042c64b7dc544a7a5587afa4b1949">Op</a></div>
<div class="line"><a id="l00073" name="l00073"></a><span class="lineno">   73</span>                                       { <span class="keywordflow">return</span> <a class="code hl_typedef" href="namespaceflow_1_1async.html#a024042c64b7dc544a7a5587afa4b1949">Op</a>(<span class="keyword">static_cast&lt;</span><a class="code hl_typedef" href="namespaceflow_1_1async.html#a968806f54b14c697fd76b3339a2bdbbf">Task_engine_ptr</a><span class="keyword">&gt;</span>(<a class="code hl_variable" href="classflow_1_1async_1_1Segregated__thread__task__loop.html#ad09c2d973e3794f36bf06bd001ca860e">m_task_engines</a>[idx])); }));</div>
<div class="line"><a id="l00074" name="l00074"></a><span class="lineno">   74</span>  <span class="comment">/* (The static_cast&lt;&gt; is probably unnecessary but makes the compiler check our type logic for us.  That&#39;s quite</span></div>
<div class="line"><a id="l00075" name="l00075"></a><span class="lineno">   75</span><span class="comment">   * helpful in this rare situation where we&#39;re essentially using a dynamically typed variable in C++ [boost::any].</span></div>
<div class="line"><a id="l00076" name="l00076"></a><span class="lineno">   76</span><span class="comment">   * There is 0 perf cost to it by the way.) */</span></div>
<div class="line"><a id="l00077" name="l00077"></a><span class="lineno">   77</span> </div>
<div class="line"><a id="l00078" name="l00078"></a><span class="lineno">   78</span>  <a class="code hl_define" href="log_8hpp.html#a325fdd4b5cf0be49b37d3b7b7c29070d">FLOW_LOG_INFO</a>(<span class="stringliteral">&quot;Segregated_thread_task_loop [&quot;</span> &lt;&lt; <span class="keyword">static_cast&lt;</span><span class="keyword">const </span><span class="keywordtype">void</span>*<span class="keyword">&gt;</span>(<span class="keyword">this</span>) &lt;&lt; <span class="stringliteral">&quot;] &quot;</span></div>
<div class="line"><a id="l00079" name="l00079"></a><span class="lineno">   79</span>                <span class="stringliteral">&quot;with nickname [&quot;</span> &lt;&lt; <a class="code hl_variable" href="classflow_1_1async_1_1Segregated__thread__task__loop.html#a02a10c00df613d1da478e97163dec523">m_nickname</a> &lt;&lt; <span class="stringliteral">&quot;] &quot;</span></div>
<div class="line"><a id="l00080" name="l00080"></a><span class="lineno">   80</span>                <span class="stringliteral">&quot;with segregated-thread scheduling via individual Task_engines &quot;</span></div>
<div class="line"><a id="l00081" name="l00081"></a><span class="lineno">   81</span>                <span class="stringliteral">&quot;across [&quot;</span> &lt;&lt; n &lt;&lt; <span class="stringliteral">&quot;] threads-to-be: &quot;</span></div>
<div class="line"><a id="l00082" name="l00082"></a><span class="lineno">   82</span>                <span class="stringliteral">&quot;Created; can accept work.  Task_qing_thread(s) not started yet until start().&quot;</span>);</div>
<div class="line"><a id="l00083" name="l00083"></a><span class="lineno">   83</span> </div>
<div class="line"><a id="l00084" name="l00084"></a><span class="lineno">   84</span>  <span class="comment">/* Each Task_engine can now be post()ed onto and otherwise used with boost.asio; won&#39;t do anything until we</span></div>
<div class="line"><a id="l00085" name="l00085"></a><span class="lineno">   85</span><span class="comment">   * start threads and run() it.  start() does that.  We&#39;re done. */</span></div>
<div class="line"><a id="l00086" name="l00086"></a><span class="lineno">   86</span>} <span class="comment">// Segregated_thread_task_loop::Segregated_thread_task_loop()</span></div>
<div class="line"><a id="l00087" name="l00087"></a><span class="lineno">   87</span> </div>
<div class="line"><a id="l00088" name="l00088"></a><span class="lineno"><a class="line" href="classflow_1_1async_1_1Segregated__thread__task__loop.html#acc7ece4467f83c910eeec9500ea2554b">   88</a></span><a class="code hl_function" href="classflow_1_1async_1_1Segregated__thread__task__loop.html#acc7ece4467f83c910eeec9500ea2554b">Segregated_thread_task_loop::~Segregated_thread_task_loop</a>() <span class="comment">// Virtual.</span></div>
<div class="line"><a id="l00089" name="l00089"></a><span class="lineno">   89</span>{</div>
<div class="line"><a id="l00090" name="l00090"></a><span class="lineno">   90</span>  <a class="code hl_define" href="log_8hpp.html#a325fdd4b5cf0be49b37d3b7b7c29070d">FLOW_LOG_INFO</a>(<span class="stringliteral">&quot;Segregated_thread_task_loop [&quot;</span> &lt;&lt; <span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: Destroying object; will stop threads/tasks unless &quot;</span></div>
<div class="line"><a id="l00091" name="l00091"></a><span class="lineno">   91</span>                <span class="stringliteral">&quot;already stopped earlier.&quot;</span>);</div>
<div class="line"><a id="l00092" name="l00092"></a><span class="lineno">   92</span>  <a class="code hl_function" href="classflow_1_1async_1_1Segregated__thread__task__loop.html#a8d007bcbedf76eb13d4e1a2df087a470">stop</a>();</div>
<div class="line"><a id="l00093" name="l00093"></a><span class="lineno">   93</span> </div>
<div class="line"><a id="l00094" name="l00094"></a><span class="lineno">   94</span>  <span class="comment">/* m_qing_threads.clear(), m_task_engines.clear() equivalents will now happen automatically.  That is mere cleanup of</span></div>
<div class="line"><a id="l00095" name="l00095"></a><span class="lineno">   95</span><span class="comment">   * stuff in memory that may include the destruction of (already stop()ped!) Task_engines. */</span></div>
<div class="line"><a id="l00096" name="l00096"></a><span class="lineno">   96</span>}</div>
<div class="line"><a id="l00097" name="l00097"></a><span class="lineno">   97</span> </div>
<div class="line"><a id="l00098" name="l00098"></a><span class="lineno"><a class="line" href="classflow_1_1async_1_1Segregated__thread__task__loop.html#a55fcb2e9f5410174c69cb1b9053a6ffd">   98</a></span><span class="keywordtype">void</span> <a class="code hl_function" href="classflow_1_1async_1_1Segregated__thread__task__loop.html#a55fcb2e9f5410174c69cb1b9053a6ffd">Segregated_thread_task_loop::start</a>(<a class="code hl_class" href="classflow_1_1Function.html">Task</a>&amp;&amp; init_task_or_empty,</div>
<div class="line"><a id="l00099" name="l00099"></a><span class="lineno">   99</span>                                        <span class="keyword">const</span> <a class="code hl_class" href="classflow_1_1Function.html">Thread_init_func</a>&amp; thread_init_func_or_empty) <span class="comment">// Virtual.</span></div>
<div class="line"><a id="l00100" name="l00100"></a><span class="lineno">  100</span>{</div>
<div class="line"><a id="l00101" name="l00101"></a><span class="lineno">  101</span>  <span class="keyword">using </span><a class="code hl_typedef" href="namespaceflow_1_1util.html#af030c3119f060a9630afca31098a78a5">util::Thread</a>;</div>
<div class="line"><a id="l00102" name="l00102"></a><span class="lineno">  102</span>  <span class="keyword">using </span><a class="code hl_typedef" href="namespaceflow_1_1util.html#ac3e89a8a271b0ddc76ac2a0ce488dea4">util::Task_engine</a>;</div>
<div class="line"><a id="l00103" name="l00103"></a><span class="lineno">  103</span>  <span class="keyword">using </span>boost::promise;</div>
<div class="line"><a id="l00104" name="l00104"></a><span class="lineno">  104</span>  <span class="keyword">using </span>std::transform;</div>
<div class="line"><a id="l00105" name="l00105"></a><span class="lineno">  105</span>  <span class="keyword">using </span>std::vector;</div>
<div class="line"><a id="l00106" name="l00106"></a><span class="lineno">  106</span> </div>
<div class="line"><a id="l00107" name="l00107"></a><span class="lineno">  107</span>  <span class="comment">/* Is the check thread-safe?  Yes, since Concurrent_task_loop::stop() must not be called concurrently with itself or</span></div>
<div class="line"><a id="l00108" name="l00108"></a><span class="lineno">  108</span><span class="comment">   * start() per our contract in doc header. */</span></div>
<div class="line"><a id="l00109" name="l00109"></a><span class="lineno">  109</span>  <span class="keywordflow">if</span> (!<a class="code hl_variable" href="classflow_1_1async_1_1Segregated__thread__task__loop.html#ad09c2d973e3794f36bf06bd001ca860e">m_task_engines</a>.front()-&gt;stopped()) <span class="comment">// They&#39;re all started/stopped together, so check random guy #1.</span></div>
<div class="line"><a id="l00110" name="l00110"></a><span class="lineno">  110</span>  {</div>
<div class="line"><a id="l00111" name="l00111"></a><span class="lineno">  111</span>    <a class="code hl_define" href="log_8hpp.html#a325fdd4b5cf0be49b37d3b7b7c29070d">FLOW_LOG_INFO</a>(<span class="stringliteral">&quot;Starting Segregated_thread_task_loop [&quot;</span> &lt;&lt; <span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: Already started earlier.  Ignoring.&quot;</span>);</div>
<div class="line"><a id="l00112" name="l00112"></a><span class="lineno">  112</span>    <span class="keywordflow">return</span>;</div>
<div class="line"><a id="l00113" name="l00113"></a><span class="lineno">  113</span>  }</div>
<div class="line"><a id="l00114" name="l00114"></a><span class="lineno">  114</span>  <span class="comment">// else</span></div>
<div class="line"><a id="l00115" name="l00115"></a><span class="lineno">  115</span> </div>
<div class="line"><a id="l00116" name="l00116"></a><span class="lineno">  116</span>  <span class="keyword">const</span> <span class="keywordtype">size_t</span> n = <a class="code hl_function" href="classflow_1_1async_1_1Segregated__thread__task__loop.html#a28d7c70f0d3147ba48a10afa84ef98c1">n_threads</a>();</div>
<div class="line"><a id="l00117" name="l00117"></a><span class="lineno">  117</span>  <a class="code hl_define" href="log_8hpp.html#a325fdd4b5cf0be49b37d3b7b7c29070d">FLOW_LOG_INFO</a>(<span class="stringliteral">&quot;Segregated_thread_task_loop [&quot;</span> &lt;&lt; <span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;] with nickname [&quot;</span> &lt;&lt; <a class="code hl_variable" href="classflow_1_1async_1_1Segregated__thread__task__loop.html#a02a10c00df613d1da478e97163dec523">m_nickname</a> &lt;&lt; <span class="stringliteral">&quot;]: &quot;</span></div>
<div class="line"><a id="l00118" name="l00118"></a><span class="lineno">  118</span>                <span class="stringliteral">&quot;1-to-1 Task_engines across [&quot;</span> &lt;&lt; n &lt;&lt; <span class="stringliteral">&quot;] Task_qing_threads: Starting.&quot;</span>);</div>
<div class="line"><a id="l00119" name="l00119"></a><span class="lineno">  119</span> </div>
<div class="line"><a id="l00120" name="l00120"></a><span class="lineno">  120</span>  <span class="comment">/* Create/start the threads.</span></div>
<div class="line"><a id="l00121" name="l00121"></a><span class="lineno">  121</span><span class="comment">   * See same logic in Cross_thread_task_loop, including comments.  It&#39;s too brief to worry about code reuse here.</span></div>
<div class="line"><a id="l00122" name="l00122"></a><span class="lineno">  122</span><span class="comment">   * Note, though, that we could just this-&gt;post(op, thread_init_func..., S_ASYNC_AND_AWAIT_CONCURRENT_COMPLETION)</span></div>
<div class="line"><a id="l00123" name="l00123"></a><span class="lineno">  123</span><span class="comment">   * for each `op` in per_thread_ops().  We promised to run thread_init_func...() *first-thing* in its thread,</span></div>
<div class="line"><a id="l00124" name="l00124"></a><span class="lineno">  124</span><span class="comment">   * though, so let&#39;s keep to the letter of our contract.  Also, this way we can do it in parallel instead of</span></div>
<div class="line"><a id="l00125" name="l00125"></a><span class="lineno">  125</span><span class="comment">   * serially. */</span></div>
<div class="line"><a id="l00126" name="l00126"></a><span class="lineno">  126</span> </div>
<div class="line"><a id="l00127" name="l00127"></a><span class="lineno">  127</span>  vector&lt;promise&lt;void&gt;&gt; thread_init_done_promises(n);</div>
<div class="line"><a id="l00128" name="l00128"></a><span class="lineno">  128</span>  <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> idx = 0; idx != n; ++idx)</div>
<div class="line"><a id="l00129" name="l00129"></a><span class="lineno">  129</span>  {</div>
<div class="line"><a id="l00130" name="l00130"></a><span class="lineno">  130</span>    <a class="code hl_class" href="classflow_1_1Function.html">Task</a> task_qing_thread_init_func;</div>
<div class="line"><a id="l00131" name="l00131"></a><span class="lineno">  131</span>    <span class="keywordflow">if</span> (!thread_init_func_or_empty.empty())</div>
<div class="line"><a id="l00132" name="l00132"></a><span class="lineno">  132</span>    {</div>
<div class="line"><a id="l00133" name="l00133"></a><span class="lineno">  133</span>      task_qing_thread_init_func = [idx, &amp;thread_init_func_or_empty]()</div>
<div class="line"><a id="l00134" name="l00134"></a><span class="lineno">  134</span>      {</div>
<div class="line"><a id="l00135" name="l00135"></a><span class="lineno">  135</span>        thread_init_func_or_empty(idx);</div>
<div class="line"><a id="l00136" name="l00136"></a><span class="lineno">  136</span>      };</div>
<div class="line"><a id="l00137" name="l00137"></a><span class="lineno">  137</span>    }</div>
<div class="line"><a id="l00138" name="l00138"></a><span class="lineno">  138</span>    <span class="keywordflow">else</span></div>
<div class="line"><a id="l00139" name="l00139"></a><span class="lineno">  139</span>    {</div>
<div class="line"><a id="l00140" name="l00140"></a><span class="lineno">  140</span>      assert(task_qing_thread_init_func.empty()); <span class="comment">// Just leave it.</span></div>
<div class="line"><a id="l00141" name="l00141"></a><span class="lineno">  141</span>    }</div>
<div class="line"><a id="l00142" name="l00142"></a><span class="lineno">  142</span> </div>
<div class="line"><a id="l00143" name="l00143"></a><span class="lineno">  143</span>    <span class="keyword">const</span> <a class="code hl_typedef" href="namespaceflow_1_1async.html#a968806f54b14c697fd76b3339a2bdbbf">Task_engine_ptr</a>&amp; <a class="code hl_function" href="classflow_1_1async_1_1Segregated__thread__task__loop.html#a5723cb843a014e8b77fa401cb93f241a">task_engine</a> = <a class="code hl_variable" href="classflow_1_1async_1_1Segregated__thread__task__loop.html#ad09c2d973e3794f36bf06bd001ca860e">m_task_engines</a>[idx];</div>
<div class="line"><a id="l00144" name="l00144"></a><span class="lineno">  144</span> </div>
<div class="line"><a id="l00145" name="l00145"></a><span class="lineno">  145</span>    <span class="comment">// boost.asio subtlety: While stopped(), run() will instantly return, unless one does this first.</span></div>
<div class="line"><a id="l00146" name="l00146"></a><span class="lineno">  146</span>    <a class="code hl_function" href="classflow_1_1async_1_1Segregated__thread__task__loop.html#a5723cb843a014e8b77fa401cb93f241a">task_engine</a>-&gt;restart();</div>
<div class="line"><a id="l00147" name="l00147"></a><span class="lineno">  147</span>    <span class="comment">// Now its Task_qing_thread can do -&gt;run() as most of its thread body (and it won&#39;t just return).</span></div>
<div class="line"><a id="l00148" name="l00148"></a><span class="lineno">  148</span> </div>
<div class="line"><a id="l00149" name="l00149"></a><span class="lineno">  149</span>    <span class="comment">// Create/start the thread.</span></div>
<div class="line"><a id="l00150" name="l00150"></a><span class="lineno">  150</span>    <a class="code hl_variable" href="classflow_1_1async_1_1Segregated__thread__task__loop.html#a15c616fe03a6deb80e4c1f556b023bba">m_qing_threads</a>[idx].reset(<span class="keyword">new</span> <a class="code hl_class" href="classflow_1_1async_1_1Task__qing__thread.html">Task_qing_thread</a>(<a class="code hl_function" href="classflow_1_1log_1_1Log__context.html#af4db395042b065b00398cd59845dcb4d">get_logger</a>(),</div>
<div class="line"><a id="l00151" name="l00151"></a><span class="lineno">  151</span>                                                   (n == 1) ? <a class="code hl_variable" href="classflow_1_1async_1_1Segregated__thread__task__loop.html#a02a10c00df613d1da478e97163dec523">m_nickname</a> : <a class="code hl_function" href="namespaceflow_1_1util.html#a685b86585da2fa5186f51854e7ae1561">util::ostream_op_string</a>(<a class="code hl_variable" href="classflow_1_1async_1_1Segregated__thread__task__loop.html#a02a10c00df613d1da478e97163dec523">m_nickname</a>, idx),</div>
<div class="line"><a id="l00152" name="l00152"></a><span class="lineno">  152</span>                                                   <a class="code hl_function" href="classflow_1_1async_1_1Segregated__thread__task__loop.html#a5723cb843a014e8b77fa401cb93f241a">task_engine</a>, <span class="keyword">true</span>, <span class="comment">// Its *own* 1-1 Task_engine.</span></div>
<div class="line"><a id="l00153" name="l00153"></a><span class="lineno">  153</span>                                                   &amp;(thread_init_done_promises[idx]),</div>
<div class="line"><a id="l00154" name="l00154"></a><span class="lineno">  154</span>                                                   std::move(task_qing_thread_init_func)));</div>
<div class="line"><a id="l00155" name="l00155"></a><span class="lineno">  155</span>  } <span class="comment">// for (idx in [0, n))</span></div>
<div class="line"><a id="l00156" name="l00156"></a><span class="lineno">  156</span>  <a class="code hl_define" href="log_8hpp.html#a325fdd4b5cf0be49b37d3b7b7c29070d">FLOW_LOG_INFO</a>(<span class="stringliteral">&quot;All threads are asynchronously starting.  Awaiting their readiness barrier-style, in sequence.&quot;</span>);</div>
<div class="line"><a id="l00157" name="l00157"></a><span class="lineno">  157</span>  <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> idx = 0; idx != n; ++idx)</div>
<div class="line"><a id="l00158" name="l00158"></a><span class="lineno">  158</span>  {</div>
<div class="line"><a id="l00159" name="l00159"></a><span class="lineno">  159</span>    thread_init_done_promises[idx].get_future().wait();</div>
<div class="line"><a id="l00160" name="l00160"></a><span class="lineno">  160</span>    <a class="code hl_define" href="log_8hpp.html#a325fdd4b5cf0be49b37d3b7b7c29070d">FLOW_LOG_INFO</a>(<span class="stringliteral">&quot;Thread [&quot;</span> &lt;&lt; idx &lt;&lt; <span class="stringliteral">&quot;] (0-based) of [&quot;</span> &lt;&lt; n &lt;&lt; <span class="stringliteral">&quot;] (1-based) is ready.&quot;</span>);</div>
<div class="line"><a id="l00161" name="l00161"></a><span class="lineno">  161</span>  }</div>
<div class="line"><a id="l00162" name="l00162"></a><span class="lineno">  162</span> </div>
<div class="line"><a id="l00163" name="l00163"></a><span class="lineno">  163</span>  <span class="comment">// Threads are running and ready for work.</span></div>
<div class="line"><a id="l00164" name="l00164"></a><span class="lineno">  164</span> </div>
<div class="line"><a id="l00165" name="l00165"></a><span class="lineno">  165</span>  <span class="comment">// See same logic in Cross_thread_task_loop, including comments.  It&#39;s too brief to worry about code reuse here.</span></div>
<div class="line"><a id="l00166" name="l00166"></a><span class="lineno">  166</span>  <span class="keywordflow">if</span> (<a class="code hl_variable" href="classflow_1_1async_1_1Segregated__thread__task__loop.html#a606e8d4566cbbca893b9ac73dd949516">m_n_threads_or_zero</a> == 0)</div>
<div class="line"><a id="l00167" name="l00167"></a><span class="lineno">  167</span>  {</div>
<div class="line"><a id="l00168" name="l00168"></a><span class="lineno">  168</span>    <a class="code hl_define" href="log_8hpp.html#a325fdd4b5cf0be49b37d3b7b7c29070d">FLOW_LOG_INFO</a>(<span class="stringliteral">&quot;Thread count was auto-determined.  Further attempting thread-to-core scheduling optimization.&quot;</span>);</div>
<div class="line"><a id="l00169" name="l00169"></a><span class="lineno">  169</span> </div>
<div class="line"><a id="l00170" name="l00170"></a><span class="lineno">  170</span>    vector&lt;Thread*&gt; worker_threads(n); <span class="comment">// Initialized to nulls.  Now set them to the raw `Thread*`s.</span></div>
<div class="line"><a id="l00171" name="l00171"></a><span class="lineno">  171</span>    transform(<a class="code hl_variable" href="classflow_1_1async_1_1Segregated__thread__task__loop.html#a15c616fe03a6deb80e4c1f556b023bba">m_qing_threads</a>.begin(), <a class="code hl_variable" href="classflow_1_1async_1_1Segregated__thread__task__loop.html#a15c616fe03a6deb80e4c1f556b023bba">m_qing_threads</a>.end(), worker_threads.begin(),</div>
<div class="line"><a id="l00172" name="l00172"></a><span class="lineno">  172</span>              [](<span class="keyword">const</span> <a class="code hl_typedef" href="classflow_1_1async_1_1Segregated__thread__task__loop.html#a9ab26417954e4a0cc083266e91ddbdff">Task_qing_thread_ptr</a>&amp; qing_thread_ptr) -&gt; <a class="code hl_typedef" href="namespaceflow_1_1util.html#af030c3119f060a9630afca31098a78a5">Thread</a>*</div>
<div class="line"><a id="l00173" name="l00173"></a><span class="lineno">  173</span>                { return qing_thread_ptr-&gt;raw_worker_thread(); });</div>
<div class="line"><a id="l00174" name="l00174"></a><span class="lineno">  174</span>    <a class="code hl_function" href="namespaceflow_1_1async.html#a3e200db7e5375de21d2568004a85dcad">optimize_pinning_in_thread_pool</a>(<a class="code hl_function" href="classflow_1_1log_1_1Log__context.html#af4db395042b065b00398cd59845dcb4d">get_logger</a>(), worker_threads,</div>
<div class="line"><a id="l00175" name="l00175"></a><span class="lineno">  175</span>                                    <a class="code hl_variable" href="classflow_1_1async_1_1Segregated__thread__task__loop.html#a99129233794b1c404e604dfdeaeea69d">m_est_hw_core_sharing_helps_algo</a>, <a class="code hl_variable" href="classflow_1_1async_1_1Segregated__thread__task__loop.html#ad197c375d1f9607431b9deb12ffab349">m_est_hw_core_pinning_helps_algo</a>,</div>
<div class="line"><a id="l00176" name="l00176"></a><span class="lineno">  176</span>                                    <a class="code hl_variable" href="classflow_1_1async_1_1Segregated__thread__task__loop.html#a7f7f91f11c9aafc386cd0882113795cd">m_hw_threads_is_grouping_collated</a>);</div>
<div class="line"><a id="l00177" name="l00177"></a><span class="lineno">  177</span>  }</div>
<div class="line"><a id="l00178" name="l00178"></a><span class="lineno">  178</span> </div>
<div class="line"><a id="l00179" name="l00179"></a><span class="lineno">  179</span>  <span class="comment">/* That&#39;s it; ready for work... but help out by running this optional init task: the key is this will wait</span></div>
<div class="line"><a id="l00180" name="l00180"></a><span class="lineno">  180</span><span class="comment">   * until that task completes in a spawned thread.  So we return only once that has returned. */</span></div>
<div class="line"><a id="l00181" name="l00181"></a><span class="lineno">  181</span>  <span class="keywordflow">if</span> (!init_task_or_empty.empty())</div>
<div class="line"><a id="l00182" name="l00182"></a><span class="lineno">  182</span>  {</div>
<div class="line"><a id="l00183" name="l00183"></a><span class="lineno">  183</span>    <a class="code hl_function" href="classflow_1_1async_1_1Segregated__thread__task__loop.html#a9ae5be313170da86f361f8bf987b40b4">post</a>(std::move(init_task_or_empty), <a class="code hl_enumvalue" href="namespaceflow_1_1async.html#a0a06794b16b72f2829ce3353557c8485a57525f29ac96f4edd56c951e7d7c7b25">Synchronicity::S_ASYNC_AND_AWAIT_CONCURRENT_COMPLETION</a>);</div>
<div class="line"><a id="l00184" name="l00184"></a><span class="lineno">  184</span>  }</div>
<div class="line"><a id="l00185" name="l00185"></a><span class="lineno">  185</span> </div>
<div class="line"><a id="l00186" name="l00186"></a><span class="lineno">  186</span>  <span class="comment">/* Sanity check: start() isn&#39;t thread-safe against stop() and start(), as we warned in our contract.</span></div>
<div class="line"><a id="l00187" name="l00187"></a><span class="lineno">  187</span><span class="comment">   * But we&#39;ve also promised that other API calls *are* thread-safe, including against</span></div>
<div class="line"><a id="l00188" name="l00188"></a><span class="lineno">  188</span><span class="comment">   * stop().  To mentally test that &lt;see similar comment in stop()&gt;.  TL;DR: post() and similar APIs work via</span></div>
<div class="line"><a id="l00189" name="l00189"></a><span class="lineno">  189</span><span class="comment">   * m_task_engines safely, even as underlying thread(s) start or stop and m_task_engines[]-&gt;run(). */</span></div>
<div class="line"><a id="l00190" name="l00190"></a><span class="lineno">  190</span>} <span class="comment">// Segregated_thread_task_loop::start()</span></div>
<div class="line"><a id="l00191" name="l00191"></a><span class="lineno">  191</span> </div>
<div class="line"><a id="l00192" name="l00192"></a><span class="lineno"><a class="line" href="classflow_1_1async_1_1Segregated__thread__task__loop.html#a8d007bcbedf76eb13d4e1a2df087a470">  192</a></span><span class="keywordtype">void</span> <a class="code hl_function" href="classflow_1_1async_1_1Segregated__thread__task__loop.html#a8d007bcbedf76eb13d4e1a2df087a470">Segregated_thread_task_loop::stop</a>() <span class="comment">// Virtual.</span></div>
<div class="line"><a id="l00193" name="l00193"></a><span class="lineno">  193</span>{</div>
<div class="line"><a id="l00194" name="l00194"></a><span class="lineno">  194</span>  <span class="comment">// This is probably unnecessary, but... &lt;see similar comment in Cross_thread_task_loop::stop()&gt;.</span></div>
<div class="line"><a id="l00195" name="l00195"></a><span class="lineno">  195</span>  <span class="keywordflow">if</span> (<a class="code hl_variable" href="classflow_1_1async_1_1Segregated__thread__task__loop.html#ad09c2d973e3794f36bf06bd001ca860e">m_task_engines</a>.front()-&gt;stopped()) <span class="comment">// They&#39;re all started/stopped together, so check random guy #1.</span></div>
<div class="line"><a id="l00196" name="l00196"></a><span class="lineno">  196</span>  {</div>
<div class="line"><a id="l00197" name="l00197"></a><span class="lineno">  197</span>    <a class="code hl_define" href="log_8hpp.html#a325fdd4b5cf0be49b37d3b7b7c29070d">FLOW_LOG_INFO</a>(<span class="stringliteral">&quot;Stopping Segregated_thread_task_loop [&quot;</span> &lt;&lt; <span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: Already stopped earlier.  Ignoring.&quot;</span>);</div>
<div class="line"><a id="l00198" name="l00198"></a><span class="lineno">  198</span>    <span class="keywordflow">return</span>;</div>
<div class="line"><a id="l00199" name="l00199"></a><span class="lineno">  199</span>  }</div>
<div class="line"><a id="l00200" name="l00200"></a><span class="lineno">  200</span>  <span class="comment">// else</span></div>
<div class="line"><a id="l00201" name="l00201"></a><span class="lineno">  201</span> </div>
<div class="line"><a id="l00202" name="l00202"></a><span class="lineno">  202</span>  <a class="code hl_define" href="log_8hpp.html#a325fdd4b5cf0be49b37d3b7b7c29070d">FLOW_LOG_INFO</a>(<span class="stringliteral">&quot;Stopping Segregated_thread_task_loop [&quot;</span> &lt;&lt; <span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: All ongoing tasks will complete normally; &quot;</span></div>
<div class="line"><a id="l00203" name="l00203"></a><span class="lineno">  203</span>                <span class="stringliteral">&quot;all pending thread tasks will be belayed [sic]; &quot;</span></div>
<div class="line"><a id="l00204" name="l00204"></a><span class="lineno">  204</span>                <span class="stringliteral">&quot;each thread will be asked to gracefully terminate and be joined synchronously.  &quot;</span></div>
<div class="line"><a id="l00205" name="l00205"></a><span class="lineno">  205</span>                <span class="stringliteral">&quot;Any subsequently-queued tasks will not run until start().&quot;</span>);</div>
<div class="line"><a id="l00206" name="l00206"></a><span class="lineno">  206</span> </div>
<div class="line"><a id="l00207" name="l00207"></a><span class="lineno">  207</span><span class="preprocessor">#ifndef NDEBUG</span></div>
<div class="line"><a id="l00208" name="l00208"></a><span class="lineno">  208</span>  <span class="keywordtype">size_t</span> idx = 0;</div>
<div class="line"><a id="l00209" name="l00209"></a><span class="lineno">  209</span><span class="preprocessor">#endif</span></div>
<div class="line"><a id="l00210" name="l00210"></a><span class="lineno">  210</span>  <span class="keywordflow">for</span> (<a class="code hl_typedef" href="classflow_1_1async_1_1Segregated__thread__task__loop.html#a9ab26417954e4a0cc083266e91ddbdff">Task_qing_thread_ptr</a>&amp; thread_ptr_in_container : <a class="code hl_variable" href="classflow_1_1async_1_1Segregated__thread__task__loop.html#a15c616fe03a6deb80e4c1f556b023bba">m_qing_threads</a>)</div>
<div class="line"><a id="l00211" name="l00211"></a><span class="lineno">  211</span>  {</div>
<div class="line"><a id="l00212" name="l00212"></a><span class="lineno">  212</span>    <span class="comment">/* Consider E = thread_ptr_in_container-&gt;task_engine().  The following statement has the following effects,</span></div>
<div class="line"><a id="l00213" name="l00213"></a><span class="lineno">  213</span><span class="comment">     * in order:</span></div>
<div class="line"><a id="l00214" name="l00214"></a><span class="lineno">  214</span><span class="comment">     *   - Any currently executing post()ed task on E completes normally (presumably quickly, if well-behaved).</span></div>
<div class="line"><a id="l00215" name="l00215"></a><span class="lineno">  215</span><span class="comment">     *     (There may well be no such task running at this time.  Thread might be idle.)</span></div>
<div class="line"><a id="l00216" name="l00216"></a><span class="lineno">  216</span><span class="comment">     *   - Any subsequent queued tasks on E are prevented from running, even if they otherwise would have run</span></div>
<div class="line"><a id="l00217" name="l00217"></a><span class="lineno">  217</span><span class="comment">     *     after the aforementioned final task (if any).  (They stay queued on )</span></div>
<div class="line"><a id="l00218" name="l00218"></a><span class="lineno">  218</span><span class="comment">     *   - E-&gt;run() therefore returns, so `*thread` exits.</span></div>
<div class="line"><a id="l00219" name="l00219"></a><span class="lineno">  219</span><span class="comment">     *   - `*thread_ptr_in_container`&#39;s thread is joined, meaning the following blocks until that thread exits</span></div>
<div class="line"><a id="l00220" name="l00220"></a><span class="lineno">  220</span><span class="comment">     *     gracefully (i.e., all of the above completes, particularly E-&gt;run() returns).</span></div>
<div class="line"><a id="l00221" name="l00221"></a><span class="lineno">  221</span><span class="comment">     *   - `*thread_ptr_in_container` is destroyed (dtor runs).  This decrements ref-count of the E shared_ptr&lt;&gt;,</span></div>
<div class="line"><a id="l00222" name="l00222"></a><span class="lineno">  222</span><span class="comment">     *     but we have E in m_task_engines[] always, so it continues to live.</span></div>
<div class="line"><a id="l00223" name="l00223"></a><span class="lineno">  223</span><span class="comment">     *</span></div>
<div class="line"><a id="l00224" name="l00224"></a><span class="lineno">  224</span><span class="comment">     * *E continues to exist for now.  In particular, if a not-yet-stopped thread&#39;s</span></div>
<div class="line"><a id="l00225" name="l00225"></a><span class="lineno">  225</span><span class="comment">     * currently executing task (if any) tries to post(*E, F), that call will safely execute but do</span></div>
<div class="line"><a id="l00226" name="l00226"></a><span class="lineno">  226</span><span class="comment">     * nothing (F() will not run, because `E-&gt;stopped() == true` now).</span></div>
<div class="line"><a id="l00227" name="l00227"></a><span class="lineno">  227</span><span class="comment">     *</span></div>
<div class="line"><a id="l00228" name="l00228"></a><span class="lineno">  228</span><span class="comment">     * @warning Without m_task_engines storing the shared_ptr&lt;&gt; E also, the above would not be safe, because:</span></div>
<div class="line"><a id="l00229" name="l00229"></a><span class="lineno">  229</span><span class="comment">     *          A race could occur wherein Task_engine E1 is destroyed, while not-yet-stopped Task_engine E2 tries to</span></div>
<div class="line"><a id="l00230" name="l00230"></a><span class="lineno">  230</span><span class="comment">     *          post(*E2, F) (crash/undefined behavior).  In that case we&#39;d need to first do</span></div>
<div class="line"><a id="l00231" name="l00231"></a><span class="lineno">  231</span><span class="comment">     *          a round of -&gt;stop()s; and only then auto-destruct m_qing_threads[] and their underlying E&#39;s. */</span></div>
<div class="line"><a id="l00232" name="l00232"></a><span class="lineno">  232</span>    assert(thread_ptr_in_container-&gt;task_engine() == <a class="code hl_variable" href="classflow_1_1async_1_1Segregated__thread__task__loop.html#ad09c2d973e3794f36bf06bd001ca860e">m_task_engines</a>[idx]);</div>
<div class="line"><a id="l00233" name="l00233"></a><span class="lineno">  233</span>    thread_ptr_in_container.reset();</div>
<div class="line"><a id="l00234" name="l00234"></a><span class="lineno">  234</span>    assert(<a class="code hl_variable" href="classflow_1_1async_1_1Segregated__thread__task__loop.html#ad09c2d973e3794f36bf06bd001ca860e">m_task_engines</a>[idx]-&gt;stopped());</div>
<div class="line"><a id="l00235" name="l00235"></a><span class="lineno">  235</span>    <span class="comment">// Any pending tasks on that Task_engine now await another thread to -&gt;run().  Then the queue will resume.</span></div>
<div class="line"><a id="l00236" name="l00236"></a><span class="lineno">  236</span> </div>
<div class="line"><a id="l00237" name="l00237"></a><span class="lineno">  237</span><span class="preprocessor">#ifndef NDEBUG</span></div>
<div class="line"><a id="l00238" name="l00238"></a><span class="lineno">  238</span>    ++idx;</div>
<div class="line"><a id="l00239" name="l00239"></a><span class="lineno">  239</span><span class="preprocessor">#endif</span></div>
<div class="line"><a id="l00240" name="l00240"></a><span class="lineno">  240</span>  } <span class="comment">// for (thread_ptr_in_container : m_qing_threads)</span></div>
<div class="line"><a id="l00241" name="l00241"></a><span class="lineno">  241</span> </div>
<div class="line"><a id="l00242" name="l00242"></a><span class="lineno">  242</span>  <span class="comment">/* Now every thread in the thread pool has exited.  Therefore by definition no post()ed tasks on `*this` will</span></div>
<div class="line"><a id="l00243" name="l00243"></a><span class="lineno">  243</span><span class="comment">   * execute until start(), and none is executing now.  In particular, they won&#39;t try to, themselves, post() more</span></div>
<div class="line"><a id="l00244" name="l00244"></a><span class="lineno">  244</span><span class="comment">   * work onto `*this`, because &quot;they&quot; cannot actually run until start().</span></div>
<div class="line"><a id="l00245" name="l00245"></a><span class="lineno">  245</span><span class="comment">   *</span></div>
<div class="line"><a id="l00246" name="l00246"></a><span class="lineno">  246</span><span class="comment">   * As promised in our contract, however, user can still post() (and other async work) from outside the tread pool;</span></div>
<div class="line"><a id="l00247" name="l00247"></a><span class="lineno">  247</span><span class="comment">   * it will work, but (again) no task/completion handler will actually execute.  There are no threads left in which it</span></div>
<div class="line"><a id="l00248" name="l00248"></a><span class="lineno">  248</span><span class="comment">   * would.</span></div>
<div class="line"><a id="l00249" name="l00249"></a><span class="lineno">  249</span><span class="comment">   *</span></div>
<div class="line"><a id="l00250" name="l00250"></a><span class="lineno">  250</span><span class="comment">   * Don&#39;t nullify each m_task_engines[]; post() (and others) will thus (haplessly but safely) post tasks onto</span></div>
<div class="line"><a id="l00251" name="l00251"></a><span class="lineno">  251</span><span class="comment">   * m_task_engines[], as we promised in our contract. */</span></div>
<div class="line"><a id="l00252" name="l00252"></a><span class="lineno">  252</span> </div>
<div class="line"><a id="l00253" name="l00253"></a><span class="lineno">  253</span>  <span class="comment">/* Sanity check: stop() isn&#39;t thread-safe against stop(), as we warned in our contract.  But we&#39;ve also promised</span></div>
<div class="line"><a id="l00254" name="l00254"></a><span class="lineno">  254</span><span class="comment">   * that other API calls *are* thread-safe, including against stop().  For brevity I leave that proof as an exercise</span></div>
<div class="line"><a id="l00255" name="l00255"></a><span class="lineno">  255</span><span class="comment">   * to reader.  That said see Cross_thread_task_loop::stop() similarly placed comment which justifies its</span></div>
<div class="line"><a id="l00256" name="l00256"></a><span class="lineno">  256</span><span class="comment">   * somewhat-more-complex situation.  Having proven that, the same logic applies here, except we don&#39;t even have the</span></div>
<div class="line"><a id="l00257" name="l00257"></a><span class="lineno">  257</span><span class="comment">   * complication of a shared Task_engine among threads.  Check the logic inside Task_qing_thread::stop(). */</span></div>
<div class="line"><a id="l00258" name="l00258"></a><span class="lineno">  258</span>} <span class="comment">// Segregated_thread_task_loop::stop()</span></div>
<div class="line"><a id="l00259" name="l00259"></a><span class="lineno">  259</span> </div>
<div class="line"><a id="l00260" name="l00260"></a><span class="lineno"><a class="line" href="classflow_1_1async_1_1Segregated__thread__task__loop.html#a28d7c70f0d3147ba48a10afa84ef98c1">  260</a></span><span class="keywordtype">size_t</span> <a class="code hl_function" href="classflow_1_1async_1_1Segregated__thread__task__loop.html#a28d7c70f0d3147ba48a10afa84ef98c1">Segregated_thread_task_loop::n_threads</a>() const <span class="comment">// Virtual.</span></div>
<div class="line"><a id="l00261" name="l00261"></a><span class="lineno">  261</span>{</div>
<div class="line"><a id="l00262" name="l00262"></a><span class="lineno">  262</span>  <span class="keywordflow">return</span> <a class="code hl_variable" href="classflow_1_1async_1_1Segregated__thread__task__loop.html#a15c616fe03a6deb80e4c1f556b023bba">m_qing_threads</a>.size();</div>
<div class="line"><a id="l00263" name="l00263"></a><span class="lineno">  263</span>}</div>
<div class="line"><a id="l00264" name="l00264"></a><span class="lineno">  264</span> </div>
<div class="line"><a id="l00265" name="l00265"></a><span class="lineno"><a class="line" href="classflow_1_1async_1_1Segregated__thread__task__loop.html#a8257d8aa45ea527ce6c0783e37346743">  265</a></span><a class="code hl_typedef" href="namespaceflow_1_1async.html#a024042c64b7dc544a7a5587afa4b1949">Op</a> <a class="code hl_function" href="classflow_1_1async_1_1Segregated__thread__task__loop.html#a8257d8aa45ea527ce6c0783e37346743">Segregated_thread_task_loop::create_op</a>() <span class="comment">// Virtual.</span></div>
<div class="line"><a id="l00266" name="l00266"></a><span class="lineno">  266</span>{</div>
<div class="line"><a id="l00267" name="l00267"></a><span class="lineno">  267</span>  <span class="keywordflow">return</span> <a class="code hl_function" href="classflow_1_1async_1_1Segregated__thread__task__loop.html#a4c42c76a9d3f2926bb5545065d69783e">per_thread_ops</a>().<a class="code hl_function" href="classflow_1_1async_1_1Op__list.html#a1aff00b9e7b67eb1bc4070533614dfc3">random_op</a>(); <span class="comment">// It makes a copy (which is just a Task_engine_ptr copy ultimately).</span></div>
<div class="line"><a id="l00268" name="l00268"></a><span class="lineno">  268</span>}</div>
<div class="line"><a id="l00269" name="l00269"></a><span class="lineno">  269</span> </div>
<div class="line"><a id="l00270" name="l00270"></a><span class="lineno"><a class="line" href="classflow_1_1async_1_1Segregated__thread__task__loop.html#a4c42c76a9d3f2926bb5545065d69783e">  270</a></span><span class="keyword">const</span> <a class="code hl_class" href="classflow_1_1async_1_1Op__list.html">Op_list</a>&amp; <a class="code hl_function" href="classflow_1_1async_1_1Segregated__thread__task__loop.html#a4c42c76a9d3f2926bb5545065d69783e">Segregated_thread_task_loop::per_thread_ops</a>() <span class="comment">// Virtual.</span></div>
<div class="line"><a id="l00271" name="l00271"></a><span class="lineno">  271</span>{</div>
<div class="line"><a id="l00272" name="l00272"></a><span class="lineno">  272</span>  <span class="keywordflow">return</span> *<a class="code hl_variable" href="classflow_1_1async_1_1Segregated__thread__task__loop.html#a3e643b2f348746d57b1e2ddb81a1150a">m_per_thread_ops</a>; <span class="comment">// It&#39;s fine until destructor runs.</span></div>
<div class="line"><a id="l00273" name="l00273"></a><span class="lineno">  273</span>}</div>
<div class="line"><a id="l00274" name="l00274"></a><span class="lineno">  274</span> </div>
<div class="line"><a id="l00275" name="l00275"></a><span class="lineno"><a class="line" href="classflow_1_1async_1_1Segregated__thread__task__loop.html#a9ae5be313170da86f361f8bf987b40b4">  275</a></span><span class="keywordtype">void</span> <a class="code hl_function" href="classflow_1_1async_1_1Segregated__thread__task__loop.html#a9ae5be313170da86f361f8bf987b40b4">Segregated_thread_task_loop::post</a>(<a class="code hl_class" href="classflow_1_1Function.html">Task</a>&amp;&amp; task, <a class="code hl_enumeration" href="namespaceflow_1_1async.html#a0a06794b16b72f2829ce3353557c8485">Synchronicity</a> synchronicity) <span class="comment">// Virtual.</span></div>
<div class="line"><a id="l00276" name="l00276"></a><span class="lineno">  276</span>{</div>
<div class="line"><a id="l00277" name="l00277"></a><span class="lineno">  277</span>  <span class="comment">/* Each thread has its own single-run()-executing Task_engine, so it&#39;s left to us to choose a random one.</span></div>
<div class="line"><a id="l00278" name="l00278"></a><span class="lineno">  278</span><span class="comment">   * Theoretically this is less efficient than in cross-thread sibling which might choose a thread that is more</span></div>
<div class="line"><a id="l00279" name="l00279"></a><span class="lineno">  279</span><span class="comment">   * free to do work rather than just being entirely random about the decision.  @todo It&#39;s conceivable some</span></div>
<div class="line"><a id="l00280" name="l00280"></a><span class="lineno">  280</span><span class="comment">   * querying as to each thread&#39;s state or load could be used to make a more informed choice.  It might also be</span></div>
<div class="line"><a id="l00281" name="l00281"></a><span class="lineno">  281</span><span class="comment">   * wortwhile to make that choice here in post() instead of at create_op() time.  Class doc header as of this writing</span></div>
<div class="line"><a id="l00282" name="l00282"></a><span class="lineno">  282</span><span class="comment">   * includes these formal to-dos.  See also task_engine() where this to-do applies. */</span></div>
<div class="line"><a id="l00283" name="l00283"></a><span class="lineno">  283</span> </div>
<div class="line"><a id="l00284" name="l00284"></a><span class="lineno">  284</span>  <span class="keyword">auto</span> <span class="keyword">const</span> chosen_thread_idx = <a class="code hl_function" href="classflow_1_1async_1_1Segregated__thread__task__loop.html#a4c42c76a9d3f2926bb5545065d69783e">per_thread_ops</a>().<a class="code hl_function" href="classflow_1_1async_1_1Op__list.html#ad0929efa574298c96c13845a6e020d7d">random_idx</a>();</div>
<div class="line"><a id="l00285" name="l00285"></a><span class="lineno">  285</span>  <span class="keyword">auto</span> <span class="keyword">const</span> chosen_task_engine = <a class="code hl_variable" href="classflow_1_1async_1_1Segregated__thread__task__loop.html#ad09c2d973e3794f36bf06bd001ca860e">m_task_engines</a>[chosen_thread_idx];</div>
<div class="line"><a id="l00286" name="l00286"></a><span class="lineno">  286</span>  <span class="comment">// Could use random_op() for slightly shorter code, but the above is potentially a bit faster, bypassing boost.any.</span></div>
<div class="line"><a id="l00287" name="l00287"></a><span class="lineno">  287</span> </div>
<div class="line"><a id="l00288" name="l00288"></a><span class="lineno">  288</span>  <a class="code hl_define" href="log_8hpp.html#affcf2e4c496ce3f42adf981669c623b8">FLOW_LOG_TRACE</a>(<span class="stringliteral">&quot;Segregated_thread_task_loop [&quot;</span> &lt;&lt; <span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: About to post single-task sequence &quot;</span></div>
<div class="line"><a id="l00289" name="l00289"></a><span class="lineno">  289</span>                 <span class="stringliteral">&quot;on randomly selected thread [&quot;</span> &lt;&lt; chosen_thread_idx &lt;&lt; <span class="stringliteral">&quot;]: &quot;</span></div>
<div class="line"><a id="l00290" name="l00290"></a><span class="lineno">  290</span>                 <span class="stringliteral">&quot;Task_engine [&quot;</span> &lt;&lt; chosen_task_engine &lt;&lt; <span class="stringliteral">&quot;].&quot;</span>);</div>
<div class="line"><a id="l00291" name="l00291"></a><span class="lineno">  291</span> </div>
<div class="line"><a id="l00292" name="l00292"></a><span class="lineno">  292</span>  <a class="code hl_function" href="classflow_1_1async_1_1Segregated__thread__task__loop.html#a68b14a36def5972a6b65f70630fe11ef">post_impl</a>(chosen_task_engine, synchronicity, std::move(task));</div>
<div class="line"><a id="l00293" name="l00293"></a><span class="lineno">  293</span>}</div>
<div class="line"><a id="l00294" name="l00294"></a><span class="lineno">  294</span> </div>
<div class="line"><a id="l00295" name="l00295"></a><span class="lineno"><a class="line" href="classflow_1_1async_1_1Segregated__thread__task__loop.html#a1b0703dffa2ea0a1105581e50cc17b9e">  295</a></span><span class="keywordtype">void</span> <a class="code hl_function" href="classflow_1_1async_1_1Segregated__thread__task__loop.html#a9ae5be313170da86f361f8bf987b40b4">Segregated_thread_task_loop::post</a>(<span class="keyword">const</span> <a class="code hl_typedef" href="namespaceflow_1_1async.html#a024042c64b7dc544a7a5587afa4b1949">Op</a>&amp; op, <a class="code hl_class" href="classflow_1_1Function.html">Task</a>&amp;&amp; task, <a class="code hl_enumeration" href="namespaceflow_1_1async.html#a0a06794b16b72f2829ce3353557c8485">Synchronicity</a> synchronicity) <span class="comment">// Virtual.</span></div>
<div class="line"><a id="l00296" name="l00296"></a><span class="lineno">  296</span>{</div>
<div class="line"><a id="l00297" name="l00297"></a><span class="lineno">  297</span>  <span class="keyword">using </span><a class="code hl_typedef" href="namespaceflow_1_1util.html#ac3e89a8a271b0ddc76ac2a0ce488dea4">util::Task_engine</a>;</div>
<div class="line"><a id="l00298" name="l00298"></a><span class="lineno">  298</span> </div>
<div class="line"><a id="l00299" name="l00299"></a><span class="lineno">  299</span>  <span class="comment">/* Since both create_op() and per_thread_ops()[i] just return an Op containing a pointer</span></div>
<div class="line"><a id="l00300" name="l00300"></a><span class="lineno">  300</span><span class="comment">   * to one of n_threads() threads, we simply execute on that thread, thus guaranteeing all other post()ed</span></div>
<div class="line"><a id="l00301" name="l00301"></a><span class="lineno">  301</span><span class="comment">   * tasks by definition of &quot;thread&quot; cannot run concurrently with this `task`. */</span></div>
<div class="line"><a id="l00302" name="l00302"></a><span class="lineno">  302</span> </div>
<div class="line"><a id="l00303" name="l00303"></a><span class="lineno">  303</span>  <span class="keyword">auto</span> <span class="keyword">const</span> chosen_task_engine = <a class="code hl_function" href="namespaceflow_1_1async.html#ad70c594985b402d9024b80370611fc1c">op_to_exec_ctx&lt;Task_engine_ptr&gt;</a>(<span class="keyword">this</span>, op);</div>
<div class="line"><a id="l00304" name="l00304"></a><span class="lineno">  304</span> </div>
<div class="line"><a id="l00305" name="l00305"></a><span class="lineno">  305</span>  <a class="code hl_define" href="log_8hpp.html#affcf2e4c496ce3f42adf981669c623b8">FLOW_LOG_TRACE</a>(<span class="stringliteral">&quot;Segregated_thread_task_loop [&quot;</span> &lt;&lt; <span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: About to post a task in multi-task sequence &quot;</span></div>
<div class="line"><a id="l00306" name="l00306"></a><span class="lineno">  306</span>                 <span class="stringliteral">&quot;on previously chosen thread: &quot;</span></div>
<div class="line"><a id="l00307" name="l00307"></a><span class="lineno">  307</span>                 <span class="stringliteral">&quot;Task_engine [&quot;</span> &lt;&lt; chosen_task_engine &lt;&lt; <span class="stringliteral">&quot;].&quot;</span>);</div>
<div class="line"><a id="l00308" name="l00308"></a><span class="lineno">  308</span> </div>
<div class="line"><a id="l00309" name="l00309"></a><span class="lineno">  309</span>  <a class="code hl_function" href="classflow_1_1async_1_1Segregated__thread__task__loop.html#a68b14a36def5972a6b65f70630fe11ef">post_impl</a>(chosen_task_engine, synchronicity, std::move(task));</div>
<div class="line"><a id="l00310" name="l00310"></a><span class="lineno">  310</span>}</div>
<div class="line"><a id="l00311" name="l00311"></a><span class="lineno">  311</span> </div>
<div class="line"><a id="l00312" name="l00312"></a><span class="lineno"><a class="line" href="classflow_1_1async_1_1Segregated__thread__task__loop.html#a4cb5a3192dad0ef7d5a228b18d11900a">  312</a></span><a class="code hl_typedef" href="namespaceflow_1_1util.html#aa0d10f5a906b3229f48979aa43e9ff7e">util::Scheduled_task_handle</a> <a class="code hl_function" href="classflow_1_1async_1_1Segregated__thread__task__loop.html#a4cb5a3192dad0ef7d5a228b18d11900a">Segregated_thread_task_loop::schedule_from_now</a>(<span class="keyword">const</span> <a class="code hl_typedef" href="namespaceflow.html#a48799f1263cdeedec125be51a3db2b79">Fine_duration</a>&amp; from_now,</div>
<div class="line"><a id="l00313" name="l00313"></a><span class="lineno">  313</span>                                                                           <a class="code hl_class" href="classflow_1_1Function.html">Scheduled_task</a>&amp;&amp; task) <span class="comment">// Virtual.</span></div>
<div class="line"><a id="l00314" name="l00314"></a><span class="lineno">  314</span>{</div>
<div class="line"><a id="l00315" name="l00315"></a><span class="lineno">  315</span>  <span class="comment">// See 1-arg post().  Keeping comments light.</span></div>
<div class="line"><a id="l00316" name="l00316"></a><span class="lineno">  316</span> </div>
<div class="line"><a id="l00317" name="l00317"></a><span class="lineno">  317</span>  <span class="keyword">auto</span> <span class="keyword">const</span> chosen_thread_idx = <a class="code hl_function" href="classflow_1_1async_1_1Segregated__thread__task__loop.html#a4c42c76a9d3f2926bb5545065d69783e">per_thread_ops</a>().<a class="code hl_function" href="classflow_1_1async_1_1Op__list.html#ad0929efa574298c96c13845a6e020d7d">random_idx</a>();</div>
<div class="line"><a id="l00318" name="l00318"></a><span class="lineno">  318</span>  <span class="keyword">auto</span> <span class="keyword">const</span> chosen_task_engine = <a class="code hl_variable" href="classflow_1_1async_1_1Segregated__thread__task__loop.html#ad09c2d973e3794f36bf06bd001ca860e">m_task_engines</a>[chosen_thread_idx];</div>
<div class="line"><a id="l00319" name="l00319"></a><span class="lineno">  319</span> </div>
<div class="line"><a id="l00320" name="l00320"></a><span class="lineno">  320</span>  <a class="code hl_define" href="log_8hpp.html#affcf2e4c496ce3f42adf981669c623b8">FLOW_LOG_TRACE</a>(<span class="stringliteral">&quot;Segregated_thread_task_loop [&quot;</span> &lt;&lt; <span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: &quot;</span></div>
<div class="line"><a id="l00321" name="l00321"></a><span class="lineno">  321</span>                 <span class="stringliteral">&quot;About to boost.asio-timer-schedule single-task sequence &quot;</span></div>
<div class="line"><a id="l00322" name="l00322"></a><span class="lineno">  322</span>                 <span class="stringliteral">&quot;on randomly selected thread [&quot;</span> &lt;&lt; chosen_thread_idx &lt;&lt; <span class="stringliteral">&quot;]: &quot;</span></div>
<div class="line"><a id="l00323" name="l00323"></a><span class="lineno">  323</span>                 <span class="stringliteral">&quot;Task_engine [&quot;</span> &lt;&lt; chosen_task_engine &lt;&lt; <span class="stringliteral">&quot;].&quot;</span>);</div>
<div class="line"><a id="l00324" name="l00324"></a><span class="lineno">  324</span> </div>
<div class="line"><a id="l00325" name="l00325"></a><span class="lineno">  325</span>  <span class="keywordflow">return</span> <a class="code hl_function" href="classflow_1_1async_1_1Segregated__thread__task__loop.html#a8fbd7b964d140c770eac1f71e52bcf1c">schedule_from_now_impl</a>(chosen_task_engine, from_now, std::move(task));</div>
<div class="line"><a id="l00326" name="l00326"></a><span class="lineno">  326</span>}</div>
<div class="line"><a id="l00327" name="l00327"></a><span class="lineno">  327</span> </div>
<div class="line"><a id="l00328" name="l00328"></a><span class="lineno"><a class="line" href="classflow_1_1async_1_1Segregated__thread__task__loop.html#a31bc0b91253d44f4ab6ee350b916d6f7">  328</a></span><a class="code hl_typedef" href="namespaceflow_1_1util.html#aa0d10f5a906b3229f48979aa43e9ff7e">util::Scheduled_task_handle</a> <a class="code hl_function" href="classflow_1_1async_1_1Segregated__thread__task__loop.html#a4cb5a3192dad0ef7d5a228b18d11900a">Segregated_thread_task_loop::schedule_from_now</a>(<span class="keyword">const</span> <a class="code hl_typedef" href="namespaceflow_1_1async.html#a024042c64b7dc544a7a5587afa4b1949">Op</a>&amp; op,</div>
<div class="line"><a id="l00329" name="l00329"></a><span class="lineno">  329</span>                                                                           <span class="keyword">const</span> <a class="code hl_typedef" href="namespaceflow.html#a48799f1263cdeedec125be51a3db2b79">Fine_duration</a>&amp; from_now,</div>
<div class="line"><a id="l00330" name="l00330"></a><span class="lineno">  330</span>                                                                           <a class="code hl_class" href="classflow_1_1Function.html">Scheduled_task</a>&amp;&amp; task) <span class="comment">// Virtual.</span></div>
<div class="line"><a id="l00331" name="l00331"></a><span class="lineno">  331</span>{</div>
<div class="line"><a id="l00332" name="l00332"></a><span class="lineno">  332</span>  <span class="keyword">using </span><a class="code hl_typedef" href="namespaceflow_1_1util.html#ac3e89a8a271b0ddc76ac2a0ce488dea4">util::Task_engine</a>;</div>
<div class="line"><a id="l00333" name="l00333"></a><span class="lineno">  333</span> </div>
<div class="line"><a id="l00334" name="l00334"></a><span class="lineno">  334</span>  <span class="comment">// See 2-arg post().  Keeping comments light.</span></div>
<div class="line"><a id="l00335" name="l00335"></a><span class="lineno">  335</span> </div>
<div class="line"><a id="l00336" name="l00336"></a><span class="lineno">  336</span>  <span class="keyword">auto</span> <span class="keyword">const</span> chosen_task_engine = <a class="code hl_function" href="namespaceflow_1_1async.html#ad70c594985b402d9024b80370611fc1c">op_to_exec_ctx&lt;Task_engine_ptr&gt;</a>(<span class="keyword">this</span>, op);</div>
<div class="line"><a id="l00337" name="l00337"></a><span class="lineno">  337</span> </div>
<div class="line"><a id="l00338" name="l00338"></a><span class="lineno">  338</span>  <a class="code hl_define" href="log_8hpp.html#affcf2e4c496ce3f42adf981669c623b8">FLOW_LOG_TRACE</a>(<span class="stringliteral">&quot;Segregated_thread_task_loop [&quot;</span> &lt;&lt; <span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: &quot;</span></div>
<div class="line"><a id="l00339" name="l00339"></a><span class="lineno">  339</span>                 <span class="stringliteral">&quot;About to boost.asio-timer-schedule a task in multi-task sequence on previously chosen thread: &quot;</span></div>
<div class="line"><a id="l00340" name="l00340"></a><span class="lineno">  340</span>                 <span class="stringliteral">&quot;Task_engine [&quot;</span> &lt;&lt; chosen_task_engine &lt;&lt; <span class="stringliteral">&quot;].&quot;</span>);</div>
<div class="line"><a id="l00341" name="l00341"></a><span class="lineno">  341</span> </div>
<div class="line"><a id="l00342" name="l00342"></a><span class="lineno">  342</span>  <span class="keywordflow">return</span> <a class="code hl_function" href="classflow_1_1async_1_1Segregated__thread__task__loop.html#a8fbd7b964d140c770eac1f71e52bcf1c">schedule_from_now_impl</a>(chosen_task_engine, from_now, std::move(task));</div>
<div class="line"><a id="l00343" name="l00343"></a><span class="lineno">  343</span>}</div>
<div class="line"><a id="l00344" name="l00344"></a><span class="lineno">  344</span> </div>
<div class="line"><a id="l00345" name="l00345"></a><span class="lineno"><a class="line" href="classflow_1_1async_1_1Segregated__thread__task__loop.html#aec44a292a4f2800f40f67bfc4bf19367">  345</a></span><a class="code hl_typedef" href="namespaceflow_1_1util.html#aa0d10f5a906b3229f48979aa43e9ff7e">util::Scheduled_task_handle</a> <a class="code hl_function" href="classflow_1_1async_1_1Segregated__thread__task__loop.html#aec44a292a4f2800f40f67bfc4bf19367">Segregated_thread_task_loop::schedule_at</a>(<span class="keyword">const</span> <a class="code hl_typedef" href="namespaceflow.html#a9d9cc2eeb10d398cff5591d446b763b8">Fine_time_pt</a>&amp; at,</div>
<div class="line"><a id="l00346" name="l00346"></a><span class="lineno">  346</span>                                                                     <a class="code hl_class" href="classflow_1_1Function.html">Scheduled_task</a>&amp;&amp; task) <span class="comment">// Virtual.</span></div>
<div class="line"><a id="l00347" name="l00347"></a><span class="lineno">  347</span>{</div>
<div class="line"><a id="l00348" name="l00348"></a><span class="lineno">  348</span>  <span class="comment">// Similar comment to Cross_thread_task_loop::schedule_at().</span></div>
<div class="line"><a id="l00349" name="l00349"></a><span class="lineno">  349</span>  <span class="keywordflow">return</span> <a class="code hl_function" href="classflow_1_1async_1_1Segregated__thread__task__loop.html#a4cb5a3192dad0ef7d5a228b18d11900a">schedule_from_now</a>(at - Fine_clock::now(), std::move(task));</div>
<div class="line"><a id="l00350" name="l00350"></a><span class="lineno">  350</span>}</div>
<div class="line"><a id="l00351" name="l00351"></a><span class="lineno">  351</span> </div>
<div class="line"><a id="l00352" name="l00352"></a><span class="lineno"><a class="line" href="classflow_1_1async_1_1Segregated__thread__task__loop.html#a0d14e3b0251ca8e8f79f58d8fbc8aa9b">  352</a></span><a class="code hl_typedef" href="namespaceflow_1_1util.html#aa0d10f5a906b3229f48979aa43e9ff7e">util::Scheduled_task_handle</a> <a class="code hl_function" href="classflow_1_1async_1_1Segregated__thread__task__loop.html#aec44a292a4f2800f40f67bfc4bf19367">Segregated_thread_task_loop::schedule_at</a>(<span class="keyword">const</span> <a class="code hl_typedef" href="namespaceflow_1_1async.html#a024042c64b7dc544a7a5587afa4b1949">Op</a>&amp; op,</div>
<div class="line"><a id="l00353" name="l00353"></a><span class="lineno">  353</span>                                                                     <span class="keyword">const</span> <a class="code hl_typedef" href="namespaceflow.html#a9d9cc2eeb10d398cff5591d446b763b8">Fine_time_pt</a>&amp; at,</div>
<div class="line"><a id="l00354" name="l00354"></a><span class="lineno">  354</span>                                                                     <a class="code hl_class" href="classflow_1_1Function.html">Scheduled_task</a>&amp;&amp; task) <span class="comment">// Virtual.</span></div>
<div class="line"><a id="l00355" name="l00355"></a><span class="lineno">  355</span>{</div>
<div class="line"><a id="l00356" name="l00356"></a><span class="lineno">  356</span>  <span class="comment">// Same comment as in other schedule_at().</span></div>
<div class="line"><a id="l00357" name="l00357"></a><span class="lineno">  357</span>  <span class="keywordflow">return</span> <a class="code hl_function" href="classflow_1_1async_1_1Segregated__thread__task__loop.html#a4cb5a3192dad0ef7d5a228b18d11900a">schedule_from_now</a>(op, at - Fine_clock::now(), std::move(task));</div>
<div class="line"><a id="l00358" name="l00358"></a><span class="lineno">  358</span>}</div>
<div class="line"><a id="l00359" name="l00359"></a><span class="lineno">  359</span> </div>
<div class="line"><a id="l00360" name="l00360"></a><span class="lineno"><a class="line" href="classflow_1_1async_1_1Segregated__thread__task__loop.html#a68b14a36def5972a6b65f70630fe11ef">  360</a></span><span class="keywordtype">void</span> <a class="code hl_function" href="classflow_1_1async_1_1Segregated__thread__task__loop.html#a68b14a36def5972a6b65f70630fe11ef">Segregated_thread_task_loop::post_impl</a>(<span class="keyword">const</span> <a class="code hl_typedef" href="namespaceflow_1_1async.html#a968806f54b14c697fd76b3339a2bdbbf">Task_engine_ptr</a>&amp; chosen_task_engine,</div>
<div class="line"><a id="l00361" name="l00361"></a><span class="lineno">  361</span>                                            <a class="code hl_enumeration" href="namespaceflow_1_1async.html#a0a06794b16b72f2829ce3353557c8485">Synchronicity</a> synchronicity, <a class="code hl_class" href="classflow_1_1Function.html">Task</a>&amp;&amp; task)</div>
<div class="line"><a id="l00362" name="l00362"></a><span class="lineno">  362</span>{</div>
<div class="line"><a id="l00363" name="l00363"></a><span class="lineno">  363</span>  <span class="keyword">using </span><a class="code hl_typedef" href="namespaceflow_1_1util.html#ac3e89a8a271b0ddc76ac2a0ce488dea4">util::Task_engine</a>;</div>
<div class="line"><a id="l00364" name="l00364"></a><span class="lineno">  364</span> </div>
<div class="line"><a id="l00365" name="l00365"></a><span class="lineno">  365</span>  <span class="comment">/* The &quot;hard&quot; part was choosing chosen_qing_thread; now we can post to that thread&#39;s segregated Task_engine.</span></div>
<div class="line"><a id="l00366" name="l00366"></a><span class="lineno">  366</span><span class="comment">   * Any details as to when to run it and whether/how long to wait for completion are forwarded to</span></div>
<div class="line"><a id="l00367" name="l00367"></a><span class="lineno">  367</span><span class="comment">   * the following per contract. */</span></div>
<div class="line"><a id="l00368" name="l00368"></a><span class="lineno">  368</span> </div>
<div class="line"><a id="l00369" name="l00369"></a><span class="lineno">  369</span>  asio_exec_ctx_post&lt;Task_engine&gt;</div>
<div class="line"><a id="l00370" name="l00370"></a><span class="lineno">  370</span>    (<a class="code hl_function" href="classflow_1_1log_1_1Log__context.html#af4db395042b065b00398cd59845dcb4d">get_logger</a>(), chosen_task_engine.get(), synchronicity, std::move(task));</div>
<div class="line"><a id="l00371" name="l00371"></a><span class="lineno">  371</span>}</div>
<div class="line"><a id="l00372" name="l00372"></a><span class="lineno">  372</span> </div>
<div class="line"><a id="l00373" name="l00373"></a><span class="lineno">  373</span><a class="code hl_typedef" href="namespaceflow_1_1util.html#aa0d10f5a906b3229f48979aa43e9ff7e">util::Scheduled_task_handle</a></div>
<div class="line"><a id="l00374" name="l00374"></a><span class="lineno"><a class="line" href="classflow_1_1async_1_1Segregated__thread__task__loop.html#a8fbd7b964d140c770eac1f71e52bcf1c">  374</a></span>  <a class="code hl_function" href="classflow_1_1async_1_1Segregated__thread__task__loop.html#a8fbd7b964d140c770eac1f71e52bcf1c">Segregated_thread_task_loop::schedule_from_now_impl</a>(<span class="keyword">const</span> <a class="code hl_typedef" href="namespaceflow_1_1async.html#a968806f54b14c697fd76b3339a2bdbbf">Task_engine_ptr</a>&amp; chosen_task_engine,</div>
<div class="line"><a id="l00375" name="l00375"></a><span class="lineno">  375</span>                                                      <span class="keyword">const</span> <a class="code hl_typedef" href="namespaceflow.html#a48799f1263cdeedec125be51a3db2b79">Fine_duration</a>&amp; from_now,</div>
<div class="line"><a id="l00376" name="l00376"></a><span class="lineno">  376</span>                                                      <a class="code hl_class" href="classflow_1_1Function.html">Scheduled_task</a>&amp;&amp; task)</div>
<div class="line"><a id="l00377" name="l00377"></a><span class="lineno">  377</span>{</div>
<div class="line"><a id="l00378" name="l00378"></a><span class="lineno">  378</span>  <span class="keyword">using </span><a class="code hl_function" href="namespaceflow_1_1util.html#a74d4a66fb00055be4e1bd6ee98e04667">util::schedule_task_from_now</a>;</div>
<div class="line"><a id="l00379" name="l00379"></a><span class="lineno">  379</span> </div>
<div class="line"><a id="l00380" name="l00380"></a><span class="lineno">  380</span>  <span class="comment">// See post_impl().  Keeping comments light.</span></div>
<div class="line"><a id="l00381" name="l00381"></a><span class="lineno">  381</span> </div>
<div class="line"><a id="l00382" name="l00382"></a><span class="lineno">  382</span>  <span class="keyword">auto</span> <span class="keyword">const</span> logger_ptr = <a class="code hl_function" href="classflow_1_1log_1_1Log__context.html#af4db395042b065b00398cd59845dcb4d">get_logger</a>();</div>
<div class="line"><a id="l00383" name="l00383"></a><span class="lineno">  383</span>  <span class="keywordflow">if</span> (logger_ptr &amp;&amp; logger_ptr-&gt;should_log(<a class="code hl_enumvalue" href="namespaceflow_1_1log.html#a5c602384e6fe9d7642740ac2fae4ad04a3ee808b04c34bf6c110e3754de277f7b">log::Sev::S_TRACE</a>, <a class="code hl_function" href="classflow_1_1log_1_1Log__context.html#a8a5fef42dc2cedf3c0d1a6e83beb2948">get_log_component</a>()))</div>
<div class="line"><a id="l00384" name="l00384"></a><span class="lineno">  384</span>  {</div>
<div class="line"><a id="l00385" name="l00385"></a><span class="lineno">  385</span>    <a class="code hl_class" href="classflow_1_1Function.html">Scheduled_task</a> task_plus_logs = [<span class="keyword">this</span>, task = std::move(task)]</div>
<div class="line"><a id="l00386" name="l00386"></a><span class="lineno">  386</span>                                    (<span class="keywordtype">bool</span> short_fired)</div>
<div class="line"><a id="l00387" name="l00387"></a><span class="lineno">  387</span>    {</div>
<div class="line"><a id="l00388" name="l00388"></a><span class="lineno">  388</span>      <a class="code hl_define" href="log_8hpp.html#a6b3b2cd7ddabf90a7c6ccd104a042cc6">FLOW_LOG_TRACE_WITHOUT_CHECKING</a>(<span class="stringliteral">&quot;Scheduled task starting: &quot;</span></div>
<div class="line"><a id="l00389" name="l00389"></a><span class="lineno">  389</span>                                      <span class="stringliteral">&quot;current processor logical core index [&quot;</span> &lt;&lt; <a class="code hl_function" href="namespaceflow_1_1async.html#a4cce43f39672e80cba5512103c53ae60">cpu_idx</a>() &lt;&lt; <span class="stringliteral">&quot;].&quot;</span>);</div>
<div class="line"><a id="l00390" name="l00390"></a><span class="lineno">  390</span>      task(short_fired);</div>
<div class="line"><a id="l00391" name="l00391"></a><span class="lineno">  391</span>      <a class="code hl_define" href="log_8hpp.html#a6b3b2cd7ddabf90a7c6ccd104a042cc6">FLOW_LOG_TRACE_WITHOUT_CHECKING</a>(<span class="stringliteral">&quot;Scheduled task ended: &quot;</span></div>
<div class="line"><a id="l00392" name="l00392"></a><span class="lineno">  392</span>                                      <span class="stringliteral">&quot;current processor logical core index [&quot;</span> &lt;&lt; <a class="code hl_function" href="namespaceflow_1_1async.html#a4cce43f39672e80cba5512103c53ae60">cpu_idx</a>() &lt;&lt; <span class="stringliteral">&quot;].&quot;</span>);</div>
<div class="line"><a id="l00393" name="l00393"></a><span class="lineno">  393</span>    };</div>
<div class="line"><a id="l00394" name="l00394"></a><span class="lineno">  394</span> </div>
<div class="line"><a id="l00395" name="l00395"></a><span class="lineno">  395</span>    <span class="keywordflow">return</span> <a class="code hl_function" href="namespaceflow_1_1util.html#a74d4a66fb00055be4e1bd6ee98e04667">schedule_task_from_now</a>(<a class="code hl_function" href="classflow_1_1log_1_1Log__context.html#af4db395042b065b00398cd59845dcb4d">get_logger</a>(), from_now, <a class="code hl_function" href="classflow_1_1async_1_1Segregated__thread__task__loop.html#a28d7c70f0d3147ba48a10afa84ef98c1">n_threads</a>() == 1,</div>
<div class="line"><a id="l00396" name="l00396"></a><span class="lineno">  396</span>                                  chosen_task_engine.get(), std::move(task_plus_logs));</div>
<div class="line"><a id="l00397" name="l00397"></a><span class="lineno">  397</span>  }</div>
<div class="line"><a id="l00398" name="l00398"></a><span class="lineno">  398</span>  <span class="comment">// else</span></div>
<div class="line"><a id="l00399" name="l00399"></a><span class="lineno">  399</span> </div>
<div class="line"><a id="l00400" name="l00400"></a><span class="lineno">  400</span>  <span class="keywordflow">return</span> <a class="code hl_function" href="namespaceflow_1_1util.html#a74d4a66fb00055be4e1bd6ee98e04667">schedule_task_from_now</a>(<a class="code hl_function" href="classflow_1_1log_1_1Log__context.html#af4db395042b065b00398cd59845dcb4d">get_logger</a>(), from_now, <a class="code hl_function" href="classflow_1_1async_1_1Segregated__thread__task__loop.html#a28d7c70f0d3147ba48a10afa84ef98c1">n_threads</a>() == 1,</div>
<div class="line"><a id="l00401" name="l00401"></a><span class="lineno">  401</span>                                chosen_task_engine.get(), std::move(task));</div>
<div class="line"><a id="l00402" name="l00402"></a><span class="lineno">  402</span>}</div>
<div class="line"><a id="l00403" name="l00403"></a><span class="lineno">  403</span> </div>
<div class="line"><a id="l00404" name="l00404"></a><span class="lineno"><a class="line" href="classflow_1_1async_1_1Segregated__thread__task__loop.html#a5723cb843a014e8b77fa401cb93f241a">  404</a></span><a class="code hl_typedef" href="namespaceflow_1_1async.html#a968806f54b14c697fd76b3339a2bdbbf">Task_engine_ptr</a> <a class="code hl_function" href="classflow_1_1async_1_1Segregated__thread__task__loop.html#a5723cb843a014e8b77fa401cb93f241a">Segregated_thread_task_loop::task_engine</a>() <span class="comment">// Virtual.</span></div>
<div class="line"><a id="l00405" name="l00405"></a><span class="lineno">  405</span>{</div>
<div class="line"><a id="l00406" name="l00406"></a><span class="lineno">  406</span>  <span class="comment">// See 1-arg post().  Keeping comments light.  Note the @todo about load-balancing applies here as well.</span></div>
<div class="line"><a id="l00407" name="l00407"></a><span class="lineno">  407</span> </div>
<div class="line"><a id="l00408" name="l00408"></a><span class="lineno">  408</span>  <span class="keyword">auto</span> <span class="keyword">const</span> chosen_thread_idx = <a class="code hl_function" href="classflow_1_1async_1_1Segregated__thread__task__loop.html#a4c42c76a9d3f2926bb5545065d69783e">per_thread_ops</a>().<a class="code hl_function" href="classflow_1_1async_1_1Op__list.html#ad0929efa574298c96c13845a6e020d7d">random_idx</a>();</div>
<div class="line"><a id="l00409" name="l00409"></a><span class="lineno">  409</span>  <span class="keyword">auto</span> <span class="keyword">const</span> chosen_task_engine = <a class="code hl_variable" href="classflow_1_1async_1_1Segregated__thread__task__loop.html#ad09c2d973e3794f36bf06bd001ca860e">m_task_engines</a>[chosen_thread_idx];</div>
<div class="line"><a id="l00410" name="l00410"></a><span class="lineno">  410</span> </div>
<div class="line"><a id="l00411" name="l00411"></a><span class="lineno">  411</span>  <a class="code hl_define" href="log_8hpp.html#affcf2e4c496ce3f42adf981669c623b8">FLOW_LOG_TRACE</a>(<span class="stringliteral">&quot;Segregated_thread_task_loop [&quot;</span> &lt;&lt; <span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: About to return boost.asio Task_engine &quot;</span></div>
<div class="line"><a id="l00412" name="l00412"></a><span class="lineno">  412</span>                 <span class="stringliteral">&quot;assigned to randomly selected thread [&quot;</span> &lt;&lt; chosen_thread_idx &lt;&lt; <span class="stringliteral">&quot;]: &quot;</span></div>
<div class="line"><a id="l00413" name="l00413"></a><span class="lineno">  413</span>                 <span class="stringliteral">&quot;Task_engine [&quot;</span> &lt;&lt; chosen_task_engine &lt;&lt; <span class="stringliteral">&quot;].&quot;</span>);</div>
<div class="line"><a id="l00414" name="l00414"></a><span class="lineno">  414</span> </div>
<div class="line"><a id="l00415" name="l00415"></a><span class="lineno">  415</span>  <span class="keywordflow">return</span> chosen_task_engine;</div>
<div class="line"><a id="l00416" name="l00416"></a><span class="lineno">  416</span>}</div>
<div class="line"><a id="l00417" name="l00417"></a><span class="lineno">  417</span> </div>
<div class="line"><a id="l00418" name="l00418"></a><span class="lineno">  418</span><span class="keyword">template</span>&lt;&gt;</div>
<div class="line"><a id="l00419" name="l00419"></a><span class="lineno"><a class="line" href="namespaceflow_1_1async.html#ad70c594985b402d9024b80370611fc1c">  419</a></span><a class="code hl_typedef" href="namespaceflow_1_1async.html#a968806f54b14c697fd76b3339a2bdbbf">Task_engine_ptr</a> <a class="code hl_function" href="namespaceflow_1_1async.html#ad70c594985b402d9024b80370611fc1c">op_to_exec_ctx&lt;Task_engine_ptr&gt;</a>([[maybe_unused]] <a class="code hl_class" href="classflow_1_1async_1_1Concurrent__task__loop.html">Concurrent_task_loop</a>* loop, <span class="keyword">const</span> <a class="code hl_typedef" href="namespaceflow_1_1async.html#a024042c64b7dc544a7a5587afa4b1949">Op</a>&amp; op)</div>
<div class="line"><a id="l00420" name="l00420"></a><span class="lineno">  420</span>{</div>
<div class="line"><a id="l00421" name="l00421"></a><span class="lineno">  421</span>  <span class="keyword">using </span>boost::any_cast;</div>
<div class="line"><a id="l00422" name="l00422"></a><span class="lineno">  422</span> </div>
<div class="line"><a id="l00423" name="l00423"></a><span class="lineno">  423</span>  assert(op.type() == <span class="keyword">typeid</span>(<a class="code hl_typedef" href="namespaceflow_1_1async.html#a968806f54b14c697fd76b3339a2bdbbf">Task_engine_ptr</a>));</div>
<div class="line"><a id="l00424" name="l00424"></a><span class="lineno">  424</span>  <span class="comment">// @todo It&#39;d be also nice to assert(&lt;this Task_engine_ptr is one of m_task_engines[]&gt;).</span></div>
<div class="line"><a id="l00425" name="l00425"></a><span class="lineno">  425</span> </div>
<div class="line"><a id="l00426" name="l00426"></a><span class="lineno">  426</span>  <span class="keywordflow">return</span> any_cast&lt;Task_engine_ptr&gt;(op);</div>
<div class="line"><a id="l00427" name="l00427"></a><span class="lineno">  427</span>}</div>
<div class="line"><a id="l00428" name="l00428"></a><span class="lineno">  428</span> </div>
<div class="line"><a id="l00429" name="l00429"></a><span class="lineno">  429</span>} <span class="comment">// namespace flow::async</span></div>
<div class="ttc" id="aasync_2util_8hpp_html"><div class="ttname"><a href="async_2util_8hpp.html">util.hpp</a></div></div>
<div class="ttc" id="aclassflow_1_1Function_html"><div class="ttname"><a href="classflow_1_1Function.html">flow::Function</a></div><div class="ttdef"><b>Definition:</b> <a href="common_8hpp_source.html#l00512">common.hpp:512</a></div></div>
<div class="ttc" id="aclassflow_1_1async_1_1Concurrent__task__loop_html"><div class="ttname"><a href="classflow_1_1async_1_1Concurrent__task__loop.html">flow::async::Concurrent_task_loop</a></div><div class="ttdoc">The core flow::async interface, providing an optionally multi-threaded thread pool onto which runnabl...</div><div class="ttdef"><b>Definition:</b> <a href="concurrent__task__loop_8hpp_source.html#l00322">concurrent_task_loop.hpp:324</a></div></div>
<div class="ttc" id="aclassflow_1_1async_1_1Op__list_html"><div class="ttname"><a href="classflow_1_1async_1_1Op__list.html">flow::async::Op_list</a></div><div class="ttdoc">Simple, immutable vector-like sequence of N opaque async::Op objects, usually corresponding to N work...</div><div class="ttdef"><b>Definition:</b> <a href="op_8hpp_source.html#l00056">op.hpp:58</a></div></div>
<div class="ttc" id="aclassflow_1_1async_1_1Op__list_html_a1aff00b9e7b67eb1bc4070533614dfc3"><div class="ttname"><a href="classflow_1_1async_1_1Op__list.html#a1aff00b9e7b67eb1bc4070533614dfc3">flow::async::Op_list::random_op</a></div><div class="ttdeci">const Op &amp; random_op(size_t *chosen_idx=0) const</div><div class="ttdoc">Returns (*this)[R], where we randomly select R as if by random_idx() and communicate it to the caller...</div><div class="ttdef"><b>Definition:</b> <a href="op_8cpp_source.html#l00051">op.cpp:51</a></div></div>
<div class="ttc" id="aclassflow_1_1async_1_1Op__list_html_ad0929efa574298c96c13845a6e020d7d"><div class="ttname"><a href="classflow_1_1async_1_1Op__list.html#ad0929efa574298c96c13845a6e020d7d">flow::async::Op_list::random_idx</a></div><div class="ttdeci">size_t random_idx() const</div><div class="ttdoc">Returns a randomly selected index from range [O, size()).</div><div class="ttdef"><b>Definition:</b> <a href="op_8cpp_source.html#l00065">op.cpp:65</a></div></div>
<div class="ttc" id="aclassflow_1_1async_1_1Segregated__thread__task__loop_html_a02a10c00df613d1da478e97163dec523"><div class="ttname"><a href="classflow_1_1async_1_1Segregated__thread__task__loop.html#a02a10c00df613d1da478e97163dec523">flow::async::Segregated_thread_task_loop::m_nickname</a></div><div class="ttdeci">const std::string m_nickname</div><div class="ttdoc">See constructor.</div><div class="ttdef"><b>Definition:</b> <a href="segregated__thread__task__loop_8hpp_source.html#l00274">segregated_thread_task_loop.hpp:274</a></div></div>
<div class="ttc" id="aclassflow_1_1async_1_1Segregated__thread__task__loop_html_a15c616fe03a6deb80e4c1f556b023bba"><div class="ttname"><a href="classflow_1_1async_1_1Segregated__thread__task__loop.html#a15c616fe03a6deb80e4c1f556b023bba">flow::async::Segregated_thread_task_loop::m_qing_threads</a></div><div class="ttdeci">std::vector&lt; Task_qing_thread_ptr &gt; m_qing_threads</div><div class="ttdoc">N task-execution-capable worker threads whose lifetimes equal those of *this, each with its own util:...</div><div class="ttdef"><b>Definition:</b> <a href="segregated__thread__task__loop_8hpp_source.html#l00293">segregated_thread_task_loop.hpp:293</a></div></div>
<div class="ttc" id="aclassflow_1_1async_1_1Segregated__thread__task__loop_html_a224eeb57edd6e218f984dcbe603b68d3"><div class="ttname"><a href="classflow_1_1async_1_1Segregated__thread__task__loop.html#a224eeb57edd6e218f984dcbe603b68d3">flow::async::Segregated_thread_task_loop::Segregated_thread_task_loop</a></div><div class="ttdeci">Segregated_thread_task_loop(log::Logger *logger_ptr, util::String_view nickname, size_t n_threads_or_zero, bool est_hw_core_sharing_helps_algo=false, bool est_hw_core_pinning_helps_algo=false, bool hw_threads_is_grouping_collated=false)</div><div class="ttdoc">Constructs object, making it available for post() and similar work, but without starting any threads ...</div><div class="ttdef"><b>Definition:</b> <a href="segregated__thread__task__loop_8cpp_source.html#l00029">segregated_thread_task_loop.cpp:29</a></div></div>
<div class="ttc" id="aclassflow_1_1async_1_1Segregated__thread__task__loop_html_a28d7c70f0d3147ba48a10afa84ef98c1"><div class="ttname"><a href="classflow_1_1async_1_1Segregated__thread__task__loop.html#a28d7c70f0d3147ba48a10afa84ef98c1">flow::async::Segregated_thread_task_loop::n_threads</a></div><div class="ttdeci">size_t n_threads() const override</div><div class="ttdoc">Implements superclass API.</div><div class="ttdef"><b>Definition:</b> <a href="segregated__thread__task__loop_8cpp_source.html#l00260">segregated_thread_task_loop.cpp:260</a></div></div>
<div class="ttc" id="aclassflow_1_1async_1_1Segregated__thread__task__loop_html_a3e643b2f348746d57b1e2ddb81a1150a"><div class="ttname"><a href="classflow_1_1async_1_1Segregated__thread__task__loop.html#a3e643b2f348746d57b1e2ddb81a1150a">flow::async::Segregated_thread_task_loop::m_per_thread_ops</a></div><div class="ttdeci">boost::movelib::unique_ptr&lt; const Op_list &gt; m_per_thread_ops</div><div class="ttdoc">See per_thread_ops().</div><div class="ttdef"><b>Definition:</b> <a href="segregated__thread__task__loop_8hpp_source.html#l00307">segregated_thread_task_loop.hpp:307</a></div></div>
<div class="ttc" id="aclassflow_1_1async_1_1Segregated__thread__task__loop_html_a4c42c76a9d3f2926bb5545065d69783e"><div class="ttname"><a href="classflow_1_1async_1_1Segregated__thread__task__loop.html#a4c42c76a9d3f2926bb5545065d69783e">flow::async::Segregated_thread_task_loop::per_thread_ops</a></div><div class="ttdeci">const Op_list &amp; per_thread_ops() override</div><div class="ttdoc">Implements superclass API.</div><div class="ttdef"><b>Definition:</b> <a href="segregated__thread__task__loop_8cpp_source.html#l00270">segregated_thread_task_loop.cpp:270</a></div></div>
<div class="ttc" id="aclassflow_1_1async_1_1Segregated__thread__task__loop_html_a4cb5a3192dad0ef7d5a228b18d11900a"><div class="ttname"><a href="classflow_1_1async_1_1Segregated__thread__task__loop.html#a4cb5a3192dad0ef7d5a228b18d11900a">flow::async::Segregated_thread_task_loop::schedule_from_now</a></div><div class="ttdeci">util::Scheduled_task_handle schedule_from_now(const Fine_duration &amp;from_now, Scheduled_task &amp;&amp;task) override</div><div class="ttdoc">Implements superclass API.</div><div class="ttdef"><b>Definition:</b> <a href="segregated__thread__task__loop_8cpp_source.html#l00312">segregated_thread_task_loop.cpp:312</a></div></div>
<div class="ttc" id="aclassflow_1_1async_1_1Segregated__thread__task__loop_html_a55fcb2e9f5410174c69cb1b9053a6ffd"><div class="ttname"><a href="classflow_1_1async_1_1Segregated__thread__task__loop.html#a55fcb2e9f5410174c69cb1b9053a6ffd">flow::async::Segregated_thread_task_loop::start</a></div><div class="ttdeci">void start(Task &amp;&amp;init_task_or_empty=Task(), const Thread_init_func &amp;thread_init_func_or_empty=Thread_init_func()) override</div><div class="ttdoc">Implements superclass API.</div><div class="ttdef"><b>Definition:</b> <a href="segregated__thread__task__loop_8cpp_source.html#l00098">segregated_thread_task_loop.cpp:98</a></div></div>
<div class="ttc" id="aclassflow_1_1async_1_1Segregated__thread__task__loop_html_a5723cb843a014e8b77fa401cb93f241a"><div class="ttname"><a href="classflow_1_1async_1_1Segregated__thread__task__loop.html#a5723cb843a014e8b77fa401cb93f241a">flow::async::Segregated_thread_task_loop::task_engine</a></div><div class="ttdeci">Task_engine_ptr task_engine() override</div><div class="ttdoc">See superclass API.</div><div class="ttdef"><b>Definition:</b> <a href="segregated__thread__task__loop_8cpp_source.html#l00404">segregated_thread_task_loop.cpp:404</a></div></div>
<div class="ttc" id="aclassflow_1_1async_1_1Segregated__thread__task__loop_html_a606e8d4566cbbca893b9ac73dd949516"><div class="ttname"><a href="classflow_1_1async_1_1Segregated__thread__task__loop.html#a606e8d4566cbbca893b9ac73dd949516">flow::async::Segregated_thread_task_loop::m_n_threads_or_zero</a></div><div class="ttdeci">const size_t m_n_threads_or_zero</div><div class="ttdoc">See constructor.</div><div class="ttdef"><b>Definition:</b> <a href="segregated__thread__task__loop_8hpp_source.html#l00276">segregated_thread_task_loop.hpp:276</a></div></div>
<div class="ttc" id="aclassflow_1_1async_1_1Segregated__thread__task__loop_html_a68b14a36def5972a6b65f70630fe11ef"><div class="ttname"><a href="classflow_1_1async_1_1Segregated__thread__task__loop.html#a68b14a36def5972a6b65f70630fe11ef">flow::async::Segregated_thread_task_loop::post_impl</a></div><div class="ttdeci">void post_impl(const Task_engine_ptr &amp;chosen_task_engine, Synchronicity synchronicity, Task &amp;&amp;task)</div><div class="ttdoc">Helper performing the core post(Task_engine&amp;) (or similar) call on behalf of the various post() overl...</div><div class="ttdef"><b>Definition:</b> <a href="segregated__thread__task__loop_8cpp_source.html#l00360">segregated_thread_task_loop.cpp:360</a></div></div>
<div class="ttc" id="aclassflow_1_1async_1_1Segregated__thread__task__loop_html_a7f7f91f11c9aafc386cd0882113795cd"><div class="ttname"><a href="classflow_1_1async_1_1Segregated__thread__task__loop.html#a7f7f91f11c9aafc386cd0882113795cd">flow::async::Segregated_thread_task_loop::m_hw_threads_is_grouping_collated</a></div><div class="ttdeci">const bool m_hw_threads_is_grouping_collated</div><div class="ttdoc">See constructor.</div><div class="ttdef"><b>Definition:</b> <a href="segregated__thread__task__loop_8hpp_source.html#l00282">segregated_thread_task_loop.hpp:282</a></div></div>
<div class="ttc" id="aclassflow_1_1async_1_1Segregated__thread__task__loop_html_a8257d8aa45ea527ce6c0783e37346743"><div class="ttname"><a href="classflow_1_1async_1_1Segregated__thread__task__loop.html#a8257d8aa45ea527ce6c0783e37346743">flow::async::Segregated_thread_task_loop::create_op</a></div><div class="ttdeci">Op create_op() override</div><div class="ttdoc">Implements superclass API.</div><div class="ttdef"><b>Definition:</b> <a href="segregated__thread__task__loop_8cpp_source.html#l00265">segregated_thread_task_loop.cpp:265</a></div></div>
<div class="ttc" id="aclassflow_1_1async_1_1Segregated__thread__task__loop_html_a8d007bcbedf76eb13d4e1a2df087a470"><div class="ttname"><a href="classflow_1_1async_1_1Segregated__thread__task__loop.html#a8d007bcbedf76eb13d4e1a2df087a470">flow::async::Segregated_thread_task_loop::stop</a></div><div class="ttdeci">void stop() override</div><div class="ttdoc">Implements superclass API.</div><div class="ttdef"><b>Definition:</b> <a href="segregated__thread__task__loop_8cpp_source.html#l00192">segregated_thread_task_loop.cpp:192</a></div></div>
<div class="ttc" id="aclassflow_1_1async_1_1Segregated__thread__task__loop_html_a8fbd7b964d140c770eac1f71e52bcf1c"><div class="ttname"><a href="classflow_1_1async_1_1Segregated__thread__task__loop.html#a8fbd7b964d140c770eac1f71e52bcf1c">flow::async::Segregated_thread_task_loop::schedule_from_now_impl</a></div><div class="ttdeci">util::Scheduled_task_handle schedule_from_now_impl(const Task_engine_ptr &amp;chosen_task_engine, const Fine_duration &amp;from_now, Scheduled_task &amp;&amp;task)</div><div class="ttdoc">Helper performing the core util::schedule_task_from_now() call on behalf of the various schedule_from...</div><div class="ttdef"><b>Definition:</b> <a href="segregated__thread__task__loop_8cpp_source.html#l00374">segregated_thread_task_loop.cpp:374</a></div></div>
<div class="ttc" id="aclassflow_1_1async_1_1Segregated__thread__task__loop_html_a99129233794b1c404e604dfdeaeea69d"><div class="ttname"><a href="classflow_1_1async_1_1Segregated__thread__task__loop.html#a99129233794b1c404e604dfdeaeea69d">flow::async::Segregated_thread_task_loop::m_est_hw_core_sharing_helps_algo</a></div><div class="ttdeci">const bool m_est_hw_core_sharing_helps_algo</div><div class="ttdoc">See constructor.</div><div class="ttdef"><b>Definition:</b> <a href="segregated__thread__task__loop_8hpp_source.html#l00278">segregated_thread_task_loop.hpp:278</a></div></div>
<div class="ttc" id="aclassflow_1_1async_1_1Segregated__thread__task__loop_html_a9ab26417954e4a0cc083266e91ddbdff"><div class="ttname"><a href="classflow_1_1async_1_1Segregated__thread__task__loop.html#a9ab26417954e4a0cc083266e91ddbdff">flow::async::Segregated_thread_task_loop::Task_qing_thread_ptr</a></div><div class="ttdeci">boost::movelib::unique_ptr&lt; Task_qing_thread &gt; Task_qing_thread_ptr</div><div class="ttdoc">Short-hand for smart pointer to Task_qing_thread.</div><div class="ttdef"><b>Definition:</b> <a href="segregated__thread__task__loop_8hpp_source.html#l00238">segregated_thread_task_loop.hpp:238</a></div></div>
<div class="ttc" id="aclassflow_1_1async_1_1Segregated__thread__task__loop_html_a9ae5be313170da86f361f8bf987b40b4"><div class="ttname"><a href="classflow_1_1async_1_1Segregated__thread__task__loop.html#a9ae5be313170da86f361f8bf987b40b4">flow::async::Segregated_thread_task_loop::post</a></div><div class="ttdeci">void post(Task &amp;&amp;task, Synchronicity synchronicity=Synchronicity::S_ASYNC) override</div><div class="ttdoc">Implements superclass API.</div><div class="ttdef"><b>Definition:</b> <a href="segregated__thread__task__loop_8cpp_source.html#l00275">segregated_thread_task_loop.cpp:275</a></div></div>
<div class="ttc" id="aclassflow_1_1async_1_1Segregated__thread__task__loop_html_acc7ece4467f83c910eeec9500ea2554b"><div class="ttname"><a href="classflow_1_1async_1_1Segregated__thread__task__loop.html#acc7ece4467f83c910eeec9500ea2554b">flow::async::Segregated_thread_task_loop::~Segregated_thread_task_loop</a></div><div class="ttdeci">~Segregated_thread_task_loop() override</div><div class="ttdoc">See superclass destructor.</div><div class="ttdef"><b>Definition:</b> <a href="segregated__thread__task__loop_8cpp_source.html#l00088">segregated_thread_task_loop.cpp:88</a></div></div>
<div class="ttc" id="aclassflow_1_1async_1_1Segregated__thread__task__loop_html_ad09c2d973e3794f36bf06bd001ca860e"><div class="ttname"><a href="classflow_1_1async_1_1Segregated__thread__task__loop.html#ad09c2d973e3794f36bf06bd001ca860e">flow::async::Segregated_thread_task_loop::m_task_engines</a></div><div class="ttdeci">std::vector&lt; Task_engine_ptr &gt; m_task_engines</div><div class="ttdoc">boost.asio Task_engines (a/k/a io_contexts) used by each respective element in m_qing_threads.</div><div class="ttdef"><b>Definition:</b> <a href="segregated__thread__task__loop_8hpp_source.html#l00300">segregated_thread_task_loop.hpp:300</a></div></div>
<div class="ttc" id="aclassflow_1_1async_1_1Segregated__thread__task__loop_html_ad197c375d1f9607431b9deb12ffab349"><div class="ttname"><a href="classflow_1_1async_1_1Segregated__thread__task__loop.html#ad197c375d1f9607431b9deb12ffab349">flow::async::Segregated_thread_task_loop::m_est_hw_core_pinning_helps_algo</a></div><div class="ttdeci">const bool m_est_hw_core_pinning_helps_algo</div><div class="ttdoc">See constructor.</div><div class="ttdef"><b>Definition:</b> <a href="segregated__thread__task__loop_8hpp_source.html#l00280">segregated_thread_task_loop.hpp:280</a></div></div>
<div class="ttc" id="aclassflow_1_1async_1_1Segregated__thread__task__loop_html_aec44a292a4f2800f40f67bfc4bf19367"><div class="ttname"><a href="classflow_1_1async_1_1Segregated__thread__task__loop.html#aec44a292a4f2800f40f67bfc4bf19367">flow::async::Segregated_thread_task_loop::schedule_at</a></div><div class="ttdeci">util::Scheduled_task_handle schedule_at(const Fine_time_pt &amp;at, Scheduled_task &amp;&amp;task) override</div><div class="ttdoc">Implements superclass API.</div><div class="ttdef"><b>Definition:</b> <a href="segregated__thread__task__loop_8cpp_source.html#l00345">segregated_thread_task_loop.cpp:345</a></div></div>
<div class="ttc" id="aclassflow_1_1async_1_1Task__qing__thread_html"><div class="ttname"><a href="classflow_1_1async_1_1Task__qing__thread.html">flow::async::Task_qing_thread</a></div><div class="ttdoc">Internally used building block of various concrete Concurrent_task_loop subclasses that encapsulates ...</div><div class="ttdef"><b>Definition:</b> <a href="task__qing__thread_8hpp_source.html#l00059">task_qing_thread.hpp:62</a></div></div>
<div class="ttc" id="aclassflow_1_1log_1_1Log__context_html_a8a5fef42dc2cedf3c0d1a6e83beb2948"><div class="ttname"><a href="classflow_1_1log_1_1Log__context.html#a8a5fef42dc2cedf3c0d1a6e83beb2948">flow::log::Log_context::get_log_component</a></div><div class="ttdeci">const Component &amp; get_log_component() const</div><div class="ttdoc">Returns reference to the stored Component object, particularly as many FLOW_LOG_*() macros expect.</div><div class="ttdef"><b>Definition:</b> <a href="log_8cpp_source.html#l00222">log.cpp:222</a></div></div>
<div class="ttc" id="aclassflow_1_1log_1_1Log__context_html_af4db395042b065b00398cd59845dcb4d"><div class="ttname"><a href="classflow_1_1log_1_1Log__context.html#af4db395042b065b00398cd59845dcb4d">flow::log::Log_context::get_logger</a></div><div class="ttdeci">Logger * get_logger() const</div><div class="ttdoc">Returns the stored Logger pointer, particularly as many FLOW_LOG_*() macros expect.</div><div class="ttdef"><b>Definition:</b> <a href="log_8cpp_source.html#l00217">log.cpp:217</a></div></div>
<div class="ttc" id="aclassflow_1_1log_1_1Logger_html"><div class="ttname"><a href="classflow_1_1log_1_1Logger.html">flow::log::Logger</a></div><div class="ttdoc">Interface that the user should implement, passing the implementing Logger into logging classes (Flow'...</div><div class="ttdef"><b>Definition:</b> <a href="log_8hpp_source.html#l01280">log.hpp:1284</a></div></div>
<div class="ttc" id="alog_8hpp_html_a325fdd4b5cf0be49b37d3b7b7c29070d"><div class="ttname"><a href="log_8hpp.html#a325fdd4b5cf0be49b37d3b7b7c29070d">FLOW_LOG_INFO</a></div><div class="ttdeci">#define FLOW_LOG_INFO(ARG_stream_fragment)</div><div class="ttdoc">Logs an INFO message into flow::log::Logger *get_logger() with flow::log::Component get_log_component...</div><div class="ttdef"><b>Definition:</b> <a href="log_8hpp_source.html#l00197">log.hpp:197</a></div></div>
<div class="ttc" id="alog_8hpp_html_a6b3b2cd7ddabf90a7c6ccd104a042cc6"><div class="ttname"><a href="log_8hpp.html#a6b3b2cd7ddabf90a7c6ccd104a042cc6">FLOW_LOG_TRACE_WITHOUT_CHECKING</a></div><div class="ttdeci">#define FLOW_LOG_TRACE_WITHOUT_CHECKING(ARG_stream_fragment)</div><div class="ttdoc">Logs a TRACE message into flow::log::Logger *get_logger() with flow::log::Component get_log_component...</div><div class="ttdef"><b>Definition:</b> <a href="log_8hpp_source.html#l00354">log.hpp:354</a></div></div>
<div class="ttc" id="alog_8hpp_html_affcf2e4c496ce3f42adf981669c623b8"><div class="ttname"><a href="log_8hpp.html#affcf2e4c496ce3f42adf981669c623b8">FLOW_LOG_TRACE</a></div><div class="ttdeci">#define FLOW_LOG_TRACE(ARG_stream_fragment)</div><div class="ttdoc">Logs a TRACE message into flow::log::Logger *get_logger() with flow::log::Component get_log_component...</div><div class="ttdef"><b>Definition:</b> <a href="log_8hpp_source.html#l00227">log.hpp:227</a></div></div>
<div class="ttc" id="anamespaceflow_1_1async_html"><div class="ttname"><a href="namespaceflow_1_1async.html">flow::async</a></div><div class="ttdoc">Flow module containing tools enabling multi-threaded event loops operating under the asynchronous-tas...</div><div class="ttdef"><b>Definition:</b> <a href="async__fwd_8hpp_source.html#l00074">async_fwd.hpp:75</a></div></div>
<div class="ttc" id="anamespaceflow_1_1async_html_a024042c64b7dc544a7a5587afa4b1949"><div class="ttname"><a href="namespaceflow_1_1async.html#a024042c64b7dc544a7a5587afa4b1949">flow::async::Op</a></div><div class="ttdeci">boost::any Op</div><div class="ttdoc">An object of this opaque type represents a collection of 1 or more async::Task, past or future,...</div><div class="ttdef"><b>Definition:</b> <a href="async__fwd_8hpp_source.html#l00153">async_fwd.hpp:153</a></div></div>
<div class="ttc" id="anamespaceflow_1_1async_html_a0a06794b16b72f2829ce3353557c8485"><div class="ttname"><a href="namespaceflow_1_1async.html#a0a06794b16b72f2829ce3353557c8485">flow::async::Synchronicity</a></div><div class="ttdeci">Synchronicity</div><div class="ttdoc">Enumeration indicating the manner in which asio_exec_ctx_post(), and various boost....</div><div class="ttdef"><b>Definition:</b> <a href="async__fwd_8hpp_source.html#l00222">async_fwd.hpp:223</a></div></div>
<div class="ttc" id="anamespaceflow_1_1async_html_a0a06794b16b72f2829ce3353557c8485a4d7a5700444c0570af37b1f9bcc6eb1f"><div class="ttname"><a href="namespaceflow_1_1async.html#a0a06794b16b72f2829ce3353557c8485a4d7a5700444c0570af37b1f9bcc6eb1f">flow::async::Synchronicity::S_ASYNC</a></div><div class="ttdeci">@ S_ASYNC</div><div class="ttdoc">Simply post the given task to execute asynchronously in some execution context – as soon as the conte...</div></div>
<div class="ttc" id="anamespaceflow_1_1async_html_a0a06794b16b72f2829ce3353557c8485a57525f29ac96f4edd56c951e7d7c7b25"><div class="ttname"><a href="namespaceflow_1_1async.html#a0a06794b16b72f2829ce3353557c8485a57525f29ac96f4edd56c951e7d7c7b25">flow::async::Synchronicity::S_ASYNC_AND_AWAIT_CONCURRENT_COMPLETION</a></div><div class="ttdeci">@ S_ASYNC_AND_AWAIT_CONCURRENT_COMPLETION</div><div class="ttdoc">Same as Synchronicity::S_ASYNC but the posting routine then waits as long as necessary for the given ...</div></div>
<div class="ttc" id="anamespaceflow_1_1async_html_a3e200db7e5375de21d2568004a85dcad"><div class="ttname"><a href="namespaceflow_1_1async.html#a3e200db7e5375de21d2568004a85dcad">flow::async::optimize_pinning_in_thread_pool</a></div><div class="ttdeci">void optimize_pinning_in_thread_pool(log::Logger *logger_ptr, const std::vector&lt; util::Thread * &gt; &amp;threads_in_pool, bool est_hw_core_sharing_helps_algo, bool est_hw_core_pinning_helps_algo, bool hw_threads_is_grouping_collated, Error_code *err_code=nullptr)</div><div class="ttdoc">Assuming the same situation as documented for optimal_worker_thread_count_per_pool(),...</div><div class="ttdef"><b>Definition:</b> <a href="concurrent__task__loop_8cpp_source.html#l00080">concurrent_task_loop.cpp:80</a></div></div>
<div class="ttc" id="anamespaceflow_1_1async_html_a4cce43f39672e80cba5512103c53ae60"><div class="ttname"><a href="namespaceflow_1_1async.html#a4cce43f39672e80cba5512103c53ae60">flow::async::cpu_idx</a></div><div class="ttdeci">uint16_t cpu_idx()</div><div class="ttdoc">Returns the 0-based processor logical (not hardware) core index of the core executing the calling thr...</div><div class="ttdef"><b>Definition:</b> <a href="async_8cpp_source.html#l00030">async.cpp:30</a></div></div>
<div class="ttc" id="anamespaceflow_1_1async_html_a968806f54b14c697fd76b3339a2bdbbf"><div class="ttname"><a href="namespaceflow_1_1async.html#a968806f54b14c697fd76b3339a2bdbbf">flow::async::Task_engine_ptr</a></div><div class="ttdeci">boost::shared_ptr&lt; util::Task_engine &gt; Task_engine_ptr</div><div class="ttdoc">Short-hand for reference-counting pointer to a mutable util::Task_engine (a/k/a boost::asio::io_conte...</div><div class="ttdef"><b>Definition:</b> <a href="async__fwd_8hpp_source.html#l00198">async_fwd.hpp:198</a></div></div>
<div class="ttc" id="anamespaceflow_1_1async_html_ad70c594985b402d9024b80370611fc1c"><div class="ttname"><a href="namespaceflow_1_1async.html#ad70c594985b402d9024b80370611fc1c">flow::async::op_to_exec_ctx&lt; Task_engine_ptr &gt;</a></div><div class="ttdeci">Task_engine_ptr op_to_exec_ctx&lt; Task_engine_ptr &gt;(Concurrent_task_loop *loop, const Op &amp;op)</div><div class="ttdoc">Template specialization for operation that obtains the underlying execution context,...</div><div class="ttdef"><b>Definition:</b> <a href="segregated__thread__task__loop_8cpp_source.html#l00419">segregated_thread_task_loop.cpp:419</a></div></div>
<div class="ttc" id="anamespaceflow_1_1async_html_adab04f47b40b92fffbe12bc33fadd223"><div class="ttname"><a href="namespaceflow_1_1async.html#adab04f47b40b92fffbe12bc33fadd223">flow::async::optimal_worker_thread_count_per_pool</a></div><div class="ttdeci">unsigned int optimal_worker_thread_count_per_pool(log::Logger *logger_ptr, bool est_hw_core_sharing_helps_algo)</div><div class="ttdoc">Assuming a planned thread pool will be receiving ~symmetrical load, and its UX-affecting (in particul...</div><div class="ttdef"><b>Definition:</b> <a href="concurrent__task__loop_8cpp_source.html#l00037">concurrent_task_loop.cpp:37</a></div></div>
<div class="ttc" id="anamespaceflow_1_1log_html_a5c602384e6fe9d7642740ac2fae4ad04a3ee808b04c34bf6c110e3754de277f7b"><div class="ttname"><a href="namespaceflow_1_1log.html#a5c602384e6fe9d7642740ac2fae4ad04a3ee808b04c34bf6c110e3754de277f7b">flow::log::Sev::S_TRACE</a></div><div class="ttdeci">@ S_TRACE</div><div class="ttdoc">Message indicates any condition that may occur with great frequency (thus verbose if logged).</div></div>
<div class="ttc" id="anamespaceflow_1_1util_html_a685b86585da2fa5186f51854e7ae1561"><div class="ttname"><a href="namespaceflow_1_1util.html#a685b86585da2fa5186f51854e7ae1561">flow::util::ostream_op_string</a></div><div class="ttdeci">std::string ostream_op_string(T const &amp;... ostream_args)</div><div class="ttdoc">Equivalent to ostream_op_to_string() but returns a new string by value instead of writing to the call...</div><div class="ttdef"><b>Definition:</b> <a href="util_2util_8hpp_source.html#l00381">util.hpp:381</a></div></div>
<div class="ttc" id="anamespaceflow_1_1util_html_a74d4a66fb00055be4e1bd6ee98e04667"><div class="ttname"><a href="namespaceflow_1_1util.html#a74d4a66fb00055be4e1bd6ee98e04667">flow::util::schedule_task_from_now</a></div><div class="ttdeci">Scheduled_task_handle schedule_task_from_now(log::Logger *logger_ptr, const Fine_duration &amp;from_now, bool single_threaded, Task_engine *task_engine, Scheduled_task_handler &amp;&amp;task_body_moved)</div><div class="ttdoc">Schedule the given function to execute in a certain amount of time: A handy wrapper around Timer (asi...</div><div class="ttdef"><b>Definition:</b> <a href="sched__task_8hpp_source.html#l00034">sched_task.hpp:34</a></div></div>
<div class="ttc" id="anamespaceflow_1_1util_html_aa0d10f5a906b3229f48979aa43e9ff7e"><div class="ttname"><a href="namespaceflow_1_1util.html#aa0d10f5a906b3229f48979aa43e9ff7e">flow::util::Scheduled_task_handle</a></div><div class="ttdeci">boost::shared_ptr&lt; Scheduled_task_handle_state &gt; Scheduled_task_handle</div><div class="ttdoc">Black-box type that represents a handle to a scheduled task as scheduled by schedule_task_at() or sch...</div><div class="ttdef"><b>Definition:</b> <a href="sched__task__fwd_8hpp_source.html#l00045">sched_task_fwd.hpp:45</a></div></div>
<div class="ttc" id="anamespaceflow_1_1util_html_ac3e89a8a271b0ddc76ac2a0ce488dea4"><div class="ttname"><a href="namespaceflow_1_1util.html#ac3e89a8a271b0ddc76ac2a0ce488dea4">flow::util::Task_engine</a></div><div class="ttdeci">boost::asio::io_context Task_engine</div><div class="ttdoc">Short-hand for boost.asio event service, the central class of boost.asio.</div><div class="ttdef"><b>Definition:</b> <a href="util__fwd_8hpp_source.html#l00135">util_fwd.hpp:135</a></div></div>
<div class="ttc" id="anamespaceflow_1_1util_html_ae4dc52186797094b3040379ff19124c9"><div class="ttname"><a href="namespaceflow_1_1util.html#ae4dc52186797094b3040379ff19124c9">flow::util::String_view</a></div><div class="ttdeci">Basic_string_view&lt; char &gt; String_view</div><div class="ttdoc">Commonly used char-based Basic_string_view. See its doc header.</div><div class="ttdef"><b>Definition:</b> <a href="string__view_8hpp_source.html#l00191">string_view.hpp:191</a></div></div>
<div class="ttc" id="anamespaceflow_1_1util_html_af030c3119f060a9630afca31098a78a5"><div class="ttname"><a href="namespaceflow_1_1util.html#af030c3119f060a9630afca31098a78a5">flow::util::Thread</a></div><div class="ttdeci">boost::thread Thread</div><div class="ttdoc">Short-hand for standard thread class.</div><div class="ttdef"><b>Definition:</b> <a href="util__fwd_8hpp_source.html#l00078">util_fwd.hpp:78</a></div></div>
<div class="ttc" id="anamespaceflow_html_a3938730ab4b89daf13d027a5f620e7ce"><div class="ttname"><a href="namespaceflow.html#a3938730ab4b89daf13d027a5f620e7ce">flow::Flow_log_component</a></div><div class="ttdeci">Flow_log_component</div><div class="ttdoc">The flow::log::Component payload enumeration comprising various log components used by Flow's own int...</div><div class="ttdef"><b>Definition:</b> <a href="common_8hpp_source.html#l00637">common.hpp:638</a></div></div>
<div class="ttc" id="anamespaceflow_html_a48799f1263cdeedec125be51a3db2b79"><div class="ttname"><a href="namespaceflow.html#a48799f1263cdeedec125be51a3db2b79">flow::Fine_duration</a></div><div class="ttdeci">Fine_clock::duration Fine_duration</div><div class="ttdoc">A high-res time duration as computed from two Fine_time_pts.</div><div class="ttdef"><b>Definition:</b> <a href="common_8hpp_source.html#l00416">common.hpp:416</a></div></div>
<div class="ttc" id="anamespaceflow_html_a9d9cc2eeb10d398cff5591d446b763b8"><div class="ttname"><a href="namespaceflow.html#a9d9cc2eeb10d398cff5591d446b763b8">flow::Fine_time_pt</a></div><div class="ttdeci">Fine_clock::time_point Fine_time_pt</div><div class="ttdoc">A high-res time point as returned by Fine_clock::now() and suitable for precise time math in general.</div><div class="ttdef"><b>Definition:</b> <a href="common_8hpp_source.html#l00413">common.hpp:413</a></div></div>
<div class="ttc" id="asched__task_8hpp_html"><div class="ttname"><a href="sched__task_8hpp.html">sched_task.hpp</a></div></div>
<div class="ttc" id="asegregated__thread__task__loop_8hpp_html"><div class="ttname"><a href="segregated__thread__task__loop_8hpp.html">segregated_thread_task_loop.hpp</a></div></div>
<div class="ttc" id="atask__qing__thread_8hpp_html"><div class="ttname"><a href="task__qing__thread_8hpp.html">task_qing_thread.hpp</a></div></div>
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